Posts Tagged ‘contacts’

What Types of Contact Lenses are Popular Right Now?

Friday, September 2nd, 2011

Contact lenses manufacturers have made great improvements in their contact lenses. Today, consumers have a wide variety of choices when buying contact lenses. The quality of contact lenses and the variety of choices available to consumers has made them a very popular choice. Today’s improvements in contact lenses make them popular for not only correcting vision, but also for fashion and special events. Below is a list of some of the types of contact lenses that popular right now.

30 Day Extended Wear Contact Lenses: Innovations in contact lens materials has permitted the development of 30 day extended wear contact lenses. With these contact lenses, users can wear them continuously for 30 days and then have to be replaced for with a new pair. The convenience and little care required make them popular. They can be worn continuously because of a special material in the contact lenses called silicone hydrogel. This material has high oxygen permeability which means oxygen can reach the eye. This makes them safer to wear.

Daily Disposable Contacts: These contacts are very easy to insert and they are tossed away and replaced with new contacts after a specific period of time such as one day wear. You do not have to clean daily disposables and there is no storage required. They will also not accumulate bacteria, dirt, and debris. They are ideal for people with allergies. They are known to be hassle-free contacts.

Color Contacts: These contacts are very popular because people can change the color of their eyes. They can be purchased to correct vision or if you just want to wear them for fashion reasons. They can definitely enhance a stylish outfit for a special occasion. You can normally purchase color lenses as disposable lenses and they are available in a variety of colors.

Contacts for Astigmatism: Astigmatism is a very common eye condition affecting millions of people. The condition is the result of a misshaped cornea causing blurriness. Contact lenses such as Toric lenses can correct the blurriness and provide the wearer with clear vision.

As you can see, there are a variety of contact lenses available today. The above list of contact lenses is some of the most popular contact lenses right now. If you think it is expensive to buy these popular contacts, you will be pleasantly surprised by the low cost if you purchase your contact lenses online. When you shop online for your contact lenses, you will enjoy discounts of up to 70% compared to traditional contact retailers. You just have to locate a reputable only contact lens retailer, choose your contacts, and provide your prescription that is less than a year old when you place your order. Online contact lens retailers offer an extensive and diverse selection of lenses so you will definitely find contacts that you want and need.

Today more people are choosing to wear contact lenses due to their convenience, comfort, and to make a fashion statement. When you buy your contact lenses online, you too can enjoy all of the advantages of wearing contact lenses without spending a lot of money.

Eye contacts with corrective, cosmetic and therapeutic functions could be a perfect alternative for a daily glasses wearer. Compatible design for eye corneas and more affordable prices offer the public a variety of new experience with acuvue contacts.

Benefits of Unisex Eyeglasses

Friday, September 2nd, 2011

It is important that we all maintain clear vision. Wearing eye correction devices such as eyeglasses is a vital part of maintaining correct vision. However, due to innovations in frame designs, many people will choose eyeglasses for sight correction as well as for fashion. People wear specific types of eyeglasses based on their mood of the day as well as for a specific environment such as at work, at a formal occasion, and for entertainment activities such as attending a night club. Fashionable eyeglasses can definitely enhance an outfit and they help people create a distinct look. Today, when it comes to fashion, there are cases where men and women fashion accessories are very similar. Some of the hottest fashion trends are designed to be unisex. This includes unisex eyeglasses which have become very popular for both men and women.

The savvy unisex shopper will find that there is a variety of unisex glasses on the market. When choosing unisex eyeglasses, there are a number of factors to take into consideration before you make your choice. Below are a number of tips to choosing unisex eyeglasses:

Unisex Frame Size: No matter which gender is wearing them, unisex frames have the same style. However, they are available in different sizes so you have to make sure you get the right six unisex frames for you. Too big frames can make your face look more noticeably small. You also don’t want large frames that will mask your more attractive features. Too small frames can make your face look unusually big. If you have a wider face and prominent facial features, a larger frame may be more suitable. The fit of the frames should be comfortable on your nose, provide clear vision for the lens, and should feel comfortable from temple to temple, behind your ears, and on the bridge of your nose.

Shape of the Unisex Frame: When choosing unisex frames, you must consider the shape of the frame. Fortunately, unisex frames are available in different shapes such as rectangular, round, oval, rimless, etc. There are also modified rectangular frames that look lie a butterfly. For those with a round face, don’t choose round frames. A round frame looks better on people with strong faces and angular jaws.

Color and Material of Unisex Frames: There are various types of frame material available. Metal frames are a popular choice to express a signature look. There are also a wide variety of frames available in different colors. The choice will often depend on your particular preference. Many people will choose a color that expresses their personality. When choosing plastic frames, you will find there are more color options available. The type of setting that you will be wearing your eyeglasses will be a factor when choosing the frame color. For instance, a bold color may not be suitable for a professional environment.

Because of the rapid growth on online shopping, there are now professional eyeglass retailers online offering a wide selection of unisex frames at prices far below the traditional eyeglass store. You will also find more of a selection than a traditional eyeglass retailer. Today, unisex clothing and accessories have become a popular trend. Unisex eyeglasses have become popular for correcting vision and making a fashion statement.

Provider of hundred pairs of discount eyeglasses and contact lens. Great varieties of styles available including children’s, Mens eyeglasses and womens eyeglasses. Clear vision is easy to get.

Is it Safe to Wear Contact Lenses Overnight?

Friday, September 2nd, 2011

In recent years, there have been many developments in the manufacturing of contact lenses. These innovative advancements, particularly in the use of silicon material, now make contact lenses much safer and comfortable to wear. There are various types of contacts lenses with certain types of contacts designed for extended wear, including wearing them continuously for a certain time period such as up to 30 days. These extended wear contact lenses do not have to be taken out and cleaned for the period that they are worn. Many consumers now wonder if the innovations in extended wear contacts make them safe to wear overnight.

Many contact lens wearers want to be able to sleep while wearing contacts so that they can wake up with clear vision and no problems requiring them to have to take them out. Also, for people who have jobs where they are on-call, wearing contact lenses while sleeping makes it easier to get up and leave without having to stop and put in their contacts. Fortunately, these specifically designed contact lenses that are called extended wear contacts now allow people to wear contacts while they sleep. Because there has to be sufficient amount of oxygen reaching the eye to maintain good eye health, these extended wear contacts are designed to allow oxygen to reach the eye. It is important to note that the contacts have to be specifically extended wear lenses because not all contact allows the needed oxygen to pass through when sleeping. All others must be removed when one goes to bed.

Traditional contact lenses have to be removed before sleeping because the material in the contacts to do permit adequate amounts of oxygen to reach the eye. If worn overnight, they will become dry and the eyes can become inflamed. Debris and bacteria can accumulate on the contacts causing red and runny eyes. Vision will also become blurred and even the tiny blood vessels can form in the cornea leading to permanent vision blockage. This makes it very unhealthy to wear traditional contact lenses while you sleep. These types of problems will often require treatment by a doctor. Only contact lenses that have been approved for overnight wear should be worn when sleeping.

Also known as ‘continuous wear’ contact lenses, extended wear lenses are made from a material called silicone hydrogel. The type of silicone hydrogel used can vary which means some contact are approved for continuous wear for certain periods of time such as 7 days, 14 days, or 30 days. It is vital that you wear the lenses for the time period specified to avoid eye health problems and the lenses remain comfortable to wear.

The extended wear contact lenses available today are disposable. When it is time to replace them, a sterile pair of contact lenses is used. This helps to avoid eye infections caused by the accumulation of debris and bacteria. Your optician will be able to tell you if extended wear contact lenses are right for you. When it comes to the costs of these contacts, consumers are now able to get them at greatly discounted prices when they buy the lenses from a professional contact lens retailer. All that is needed is a prescription that is less than a year old. You often save up to 70% compared to traditional eye wear stores. Due to the remarkable developments in technology and the benefit of online shopping, it is easy and affordable to acquire extended wear contact lenses.

Contact lenses with corrective, cosmetic and therapeutic functions could be a perfect alternative for a daily glasses wearer. Compatible design for eye corneas and more affordable prices offer the public a variety of new experience with acuvue contacts.

Women’s Eyeglasses and Fashion

Friday, September 2nd, 2011

Traditionally people wore eye glasses as a medical aid for correcting their vision. However, today in such a fashion conscious society, more women are buying eyeglasses not only to improve their eye sight, but also to improve their appearance. Many women have several different pairs of eyeglasses. When choosing their eyeglasses carefully, women can make their eyeglasses as much a fashion accessory as their earrings and necklaces. Below is a guide on wearing women’s eyeglasses so you can express your personal style and fashion taste.

Eyeglasses Prescription: If you are buying eyeglasses to correct your vision, it is important to see an optician for an eye exam and prescription. Although you may be looking for an attractive pair of frames to suit your personal style, it is important that you remember that the eyeglasses are an important aid in correcting your vision. You eyeglasses should fulfill their intended purpose while making you look good.

Eyeglasses that Fit your Face: It is important to choose eyeglasses that do not stand out when people look at you. For instance, large frames on a small face will bring too much attention to eyeglasses. The frames you choose should complement your face and not make the face appear too small or too big. The eyeglasses should be comfortable and not look awkward when you wear them.

Shape of Eyeglasses: The shape of the eyeglasses is another important consideration. You should wear eyeglasses that complement your face. For instance, a rectangular frame will provide a good balance with a rounded face. Do not match the face of your shape with the shape of the frames. As well, if you have certain facial features that stand out, don’t wear eyeglasses that are considered extreme as they will make the strong facial feature stand out even more. You can find eyeglasses frames in such shapes as oval, round, hearts, butterfly, square, teardrops, and rectangular.

Size of the Eyeglasses: It is important to consider the size of the frames. The size of the eyeglasses that you choose should enhance your face and not detract from it. For instance, really small frames will not look good on a person with a large face. As well, a big frame on a small face looks awkward. You need to choose the right size frames for your face.

Eyeglasses Design: Today, there are many different types of glasses frames available. Whether you are looking to create a trendy, signature, professional, or sporty look, there are a wide selection of different styles of frames w available in different colors and designs. Designer labels eyeglasses are often chosen by women looking to make a fashion statement. There a lot of hot designer frames on the market that includes Cinzia, D&G, Apple Bottom, LuLu Guinness, Laura Ashley, OGI Eyewear, Balenciaga, and Phoebe Couture.

Frame Material: Today, eyeglasses are available in different materials. For instance, you can get eyeglasses that are made of plastic, metal, and polycarbonate. The frames are much lighter than they used to be. The type of frame material you choose will depend on the purpose of the eyeglasses, For instance, if you are playing sports, you may want polycarbonate frames. Even if you have a strong prescription, you can still get thin eyeglasses. For example, Aaodized titanium is used to provide one of the thinnest frames that are lightweight and strong. Remember, the frames you choose will have to work with your prescription lenses.

For many women, picking the frames to go with their prescription is an important decision. Fortunately, innovation in eyeglass technology has resulted in a wide variety of frames. One of the best ways to locate a diverse selection of frames is to shop at an online eyewear retailer’s website. You will have access to an extensive range of discount eyeglasses. With a quality pair of eyeglasses, you will definitely express your personal style and fashion tastes.

Provider of hundred pairs of discount eyeglasses and contact lens. Great varieties of styles available including children’s, Mens eyeglasses and womens eyeglasses. Clear vision is easy to get.

Tips on Finding the Right Eyeglasses for You

Friday, September 2nd, 2011

New glasses are needed for changed vision or simply for new look. However, finding the right eyewear can be difficult. When choosing new eyeglasses, there are a number of factors to consider which will help ensure you buy the right eyeglasses for you. Below is a list of tips on how to find the right pair of eyeglasses for you.

Choosing Frames: When choosing your frames, you have to determine your purpose for wearing eyeglasses. For instance, will you be wearing the frames for sports activities, reading, every day wear, work, or at work? The type of frames you choose should be based on such considerations as durability, improving appearance, quality, whether they complement your face so as to not make certain features stand out, and the type of environment in which you will be wearing them.

Return Policy: Most retailers will have a certain time period in which you can return your eyeglasses if there is a problem. Often, people will not really get sense of how satisfied they are with their frames until they have worn them for a day. Having a return policy with the purchase will ensure that if there are issues with your eyeglasses, you can return them and get another pair. Make sure you read the fine print and understand the terms and conditions of your purchase.

Finding the Right Eyeglasses Retailer: Today, there are more options available to consumers looking for quality eyeglasses at affordable prices. One of the best places to find an extensive collection of eyeglasses is online. Online eyeglass retailers offer a diverse selection of eyeglasses at significantly discounted prices. You can even get the top designer frames at cheaper prices. All you have to do is find a professional and reputable eyewear retailer online offering wide selection of eyeglasses. Once you have chosen your frames, you simply place your order that will include your most recent prescription that is less than a year old. They are even able to fit a wide variety of prescriptions for different eye conditions. These online retailers have a larger selection than conventional retailers so you will be able to find the right eyeglasses that meet your needs. They even have the top brand name discount eyeglasses at low prices. Buying online also allows consumers to comparison shop.

Buying eyeglasses does not have to be a difficult, time consuming, and expensive task. When you know what type of frames complement your face, have a recent prescription from your optician, and you shop online for the eyeglasses, you will have a fun shopping experience and save a lot of money. With such a diverse selection of frames available, you will definitely find a pair of eyeglasses that allows you to correct your vision while improving your appearance. When you are ready for a new pair of eyeglasses that is right for you, consider the benefits of shopping online.

Provider of hundred pairs of discount eyeglasses and contact lens. Great varieties of styles available including children’s, Mens eyeglasses and womens eyeglasses. Clear vision is easy to get.

How to Buy Discount Quality Eyeglasses

Friday, September 2nd, 2011

Today, everyone seems to be looking for ways to trim their budgets. If there is a way to reduce the costs on a specific an expense, it makes sense to take advantage of the opportunity. One way consumers can cut down on one expense is buying eyeglasses online. If you are one of the millions of people who would love to buy quality eyeglasses, including brand name stylish eyeglasses, shopping at an online eyeglass retailer may be the solution.

When you shop online for your eyeglasses, whether it is for prescription eyeglasses, sunglasses, or trendy eyeglasses to complement your outfit, online eyeglasses have a wide selection of quality and brand name eyeglasses that will meet your unique needs. When shopping online, you can get the eyeglasses you want and need. Often traditional eyeglasses stores have a specific eyeglasses inventory, unlike online retailers who have a wide selection of eyeglasses at greatly reduced prices, often up to 70% off compared to the traditional retailer. This is due to the agreements they have with eyeglasses manufacturers and they do not have a high overhead. They get their eyeglasses at cheaper costs which enables them to pass the savings on to their customers.

When you shop online for your eyeglasses, you will be surprised by the immense selection. You will not have to run around to various eyeglass stores to find the pair you want. With a click of the mouse, you will find and buy the exact pair of eyeglasses you want. Whether it is prescription eyeglasses, sunglasses, stylish glasses like the celebrities wear, sports glasses, reading glasses, and more, everything is right there on your computer screen. And the cheap prices will definitively leave you feeling satisfied with your purchase. With such cheap prices, you may even end up getting two pairs of eyeglasses

It is not just the cheap prices that make shopping online for eyeglasses so popular. Convenience is another benefit. You can shop any time of the day or night. It is a stress-free way of shopping as you can take your time searching so that you know you will get the exact pair you need. You also know that you are buying quality eyeglasses made from the top eyeglasses manufacturers. They are the same quality eyeglasses as traditional eyeglass retailers except you will not be paying the higher mark up price. In addition you will get your choice of enhancements such as UV protection, hard case, and scratch resistance coating. You purchase actually makes a great investment in your vision correction.

Buying glasses at discounted prices online means you save money, time, and frustration. You have a lot more control over your purchase and the entire experience is actually fun. You will enjoy the savings, pick the exact pair of glasses you want, place your order, and relax and wait for your eyeglasses to arrive. The internet has made shopping fun instead of a chore. For men, it is a great way to shop as it is fast and convenient. It just makes sense to connect to the internet, go to a reputable online retailer, and start shopping. Online shopping for eyeglasses is another way consumers will get quality while saving money.

Provider of hundred pairs of discount eyeglasses and contact lens. Great varieties of styles available including children’s, Mens eyeglasses and womens eyeglasses. Clear vision is easy to get.

An Essential Description On SuperLasik Surgery In Comparison To Lasik

Thursday, June 9th, 2011

There is a new and improved technology of Lasik. This method is known as SuperLasik. The application of this procedure is said to be a safe in comparison to Lasik as it is specially for those patients with out of the ordinary corneas for example those with thin ones. Studies on the procedure also indicate that the effects of the same are precise and last a longer time.

This procedure involves the use of an instrument that raises a very thin flap in comparison to the one raised during Lasik. They then use the latest generation of lasers to do surface ablation. The flap is then returned to its earlier position. During this procedure the corneal structure is not altered in any way. This is the reason why it is appropriate for thin and abnormal cornea.

Patients who have attained eighteen years are viable candidates for the process. The process is a worthy one since one can save on the cash that they might have spent for eyewear that could have been for correction of sight and other visits to the ophthalmologist. Considering that the cornea will not experience any trauma should be used as an addition to taking the procedure.

When patients leave the surgery they have a more clarified vision. For this reason they have a better outlook on life. Most patients even drive the next day and go back to their usual routine. Moreover there is rejuvenation considering the new outlook. The safety of the procedure adds the advantages in addition are the thin flap.

There is a disadvantage to this procedure though. Some patients who suffer from some conditions cannot have the surgery performed on them. It may be conditions such as cataracts present and conditions of immunological or corneal diseases for example keratoconous. This though only affects a group of patients with these conditions.

It is important that a patient gets the pre Lasik and SuperLasik tests run on them before the surgery. This is because they might be having any of the conditions that makes them unsuitable candidates for the procedure. It is also important that they understand what the procedure is all about before they get it done. The surgeon should give the patient a step by step guide on the SuperLasik procedure before performing it.

In addition to all that a patient should sample views from patients who have undergone the procedure before. It is also important that they have a payment method that is suitable for them. It is important for patients not to pick up a strenuous payment method to make it a smooth procedure all the way.

Checkout other eye treatments at Lasik and checkout Superlasik correction at Khanna Institute

On-going Studies Prove That Cross-Linking Helps Keratoconus

Wednesday, May 18th, 2011

Keratoconus sufferers can take comfort in the new trials that have found that cross-linking helps keratoconus. Affecting one person in every thousand, this degenerative disease in the eye causes the part of the eye known as the cornea to change its shape from a cone into a curve. This exciting new procedure has been shown to stop that regression.

Keratoconus typically distorts the patients vision and causes them to see multiple images, streaks and to become very sensitive to light. It is typically diagnosed during the early teenage years but is more common in its severity in the next two following decades.

Unfortunately the loss of vision quality can affect the sufferers ability to drive a car or read, and so this condition can serious alter the quality of a persons life. Although both contact lenses and ring segments for the cornea can be enough to cope short term with the condition; a more drastic solution has to be found for the long term, and this can mean that surgery is the only option.

Thankfully leaps and bounds in medical research have allowed a technique known as Corneal Collagen Cross-linking to be developed, and early research has shown that this new advancement can slow down and actually halt the regression of this ailment.

The treatment uses Riboflavin and UVA light to form new, strong bonds with the collagen strands in the corneal layer known as the stroma. After consultation, the procedure is performed under topical anaesthesia. The surface of the cornea is partially gently scratched. This has the same sensation as a foreign body inside the eye and will make the eye a little red. Drops of the Riboflavin solution is applied painlessly into the eye and is then activated by the UVA lighting beamed onto the cornea.

Patients have reported that the hour long operation was very positive and results were pleasing. Afterwards the patient is only required to wear a special eye pad and use antibiotic cream overnight as the corneal surface heals extremely rapidly. Self-administered pain relief can be used for the first 1-2 days as the eye may be a little uncomfortable.

Studies have shown that cross linking is effective in arresting progression of Keratoconus and it has been indicated that that the regression of condition is halted. Clinical trials are still on-going, but these promising early trials show that cross-linking helps keratoconus, and has a promising future for the worldwide treatment of this condition, maybe even significantly reducing the need for future corneal transplantation.

Take a look at some of the new keratoconus treatments at keratoconus treatment and checkout Lasik correction at Khanna Institute

Full Quality Of Life Through Treatments For Keratoconus

Wednesday, April 27th, 2011

Genetics, allergies, Southern Asians and Downs Syndrome are linked to the population affected by Keratoconus, which is a degenerative disease process of the cornea of the eye. A collagen malfunction induces changes in the structure of the cornea from curved to conical resulting in visual impairment. A connection in those afflicted with this disorder has been possibly attributed to allergic disease affecting the eyes that cause some to develop secondary “eye rubbing” resulting in a contributing factor in cornea deterioration in genetically predisposed patients. Treatments for keratoconus can restore 20/20 vision.

Early symptoms may exhibit minor blurring of vision often associated with refractive eye defects. Early diagnosis is often in adolescence. This disorder is often bilateral, but can exhibit asymmetrically. Acuity can deteriorate rapidly at all distances. Photophobia, eye-strain and itching without pain may present. Night vision may be significantly impaired. A classic, definitive clue is the perception of “ghost” images, with image movement noted relative to heartbeat. Patients may be aware of streaking and flaring distortion at light sources.

Definitive diagnosis is accomplished through slit-lamp examination of the cornea. The test with highest accuracy is corneal topography that allows mapping of the curve of the cornea. Topography will identify keratoconus, which should not be treated with laser surgery. Advanced disease is determined by degree of thinning at the point of the cone through a painless examine called pachymetry.

Patients with keratoconus have a good prognosis. Very mild cases may be corrected through glasses or soft contact lenses. Most patients, however, will require rigid contact lenses for the best visual correction. Patients with more advanced disease will benefit optimally from gas-permeable contact lenses, which will maintain their ability to legally drive and read normal print.

Surgery may be necessary in treatments for keratoconus that have progressed. Corneal ring segments restore reshaped corneas for effective use of contact lenses. Experimental corneal cross-linking reduces flexibility of the cornea to stabilize the disorder, allowing follow up with safe correction through laser surgery. More rarely, corneal transplantation may be required.

Corneal transplantation is reserved for those patients with the most severe presentations of deterioration. Results are generally good. Recovery can be lengthy, however, and patients usually need contact lenses. Rejection risk is much lower than other organ transplants.

In the case of young adults that do not have a perfect vision improvement with glasses needs to be evaluated by a specialist in corneal refractory diseases. There is evidence that unaddressed allergic disease with eye involvement can precipitate the exacerbation of this disease and recommend all patients abstain from rubbing their eyes, although the general consensus is that the disease is not preventable.

Rajesh Khanna, M.D. has more reviews and suggestions at his website keratoconus and checkout Lasik correction at Khanna Institute

Lasik Eye Surgery: Look Through New Eyes

Tuesday, April 20th, 2010

When thinking about Lasik eye surgery, you want to make sure you get all of the information that is available for you to use. This is easy to know if you look around the internet to locate one of the doctors who will let you know if this surgery is right for you, or not. Since every surgery is not error proof, there are complications that can arise, make sure to find out about them.

There are many things that are available to anyone who wants this surgery. You just have to make sure you know all of the facts before you actually go through with it to ensure that this is the selection that is best for you. Since there are risks to every surgery that is done, you need to gather the facts before making an informed decision on the matter.

Ask your doctor any questions, and talk to them about any concerns that you may have regarding eye surgery. They are there to make sure you know as much as you can about the procedure before you undergo it, so you can be sure this is the way you want to go. They will also tell you about any precautions you should take.

When finding out that you’re a good candidate for surgery, the surgeon will let you know what you can and cannot do before and after you have eye surgery to allow you to better your chances of everything turning out right. You should adhere to what they say to ensure the best recovery.

This can be covered by insurance, as well as financing options depending on the severity of the person’s vision. Usually the patient will have to undergo a test to find out if they are a good candidate for the surgery, and follow the instructions that the surgeon gives the patient before and after the procedure to ensure there are no complications from the procedure.

There are benefits to the surgery which include being able to see without having glasses or contacts on, which is a relief to people who have been wearing them for most if not all of their lives. The statistics state that more than one million people undergo this surgery in order to correct their vision every year, and these numbers continue to climb.

Some of the risks and complications that occur when you go through this surgery is sensitivity to light, dry eyes, loss of visual clarity, and sensitivity in general. You will have to assess if the risks involved are worth taking on how badly you would like the surgery done. Ask your surgeon for a more detailed list of the complications that can arise with this.

There is no need to wait since you’re able to find a surgeon near you, read all of the testimonials, and talk to a doctor that knows about Lasik. They will be happy to help you with your decision, and find out if you’re a good candidate for the surgery. This is reassuring to anyone who wants to be free from contact lenses and glasses.

One is that there have not yet been any long term studies done as to the effects of lasik eye surgery. History Of Laser Eye Surgery Clinical studies show that the problems are minor and the reward can be great. This means that the doctor will not be able to guarantee the eyesight you receive.