All About Lasik

If you have what has been determined as humanity’s “normal” eyesight, you have 20/20 vision. In countries which use metric measurements, it is called 6/6 vision, referring to meters instead of feet. 20/20 vision is not “perfect” vision, but it is clear at all distances, needing no glasses or contact lenses. Vision can be better than 20/20, so let’s look at that further down this article.

The Snellen Eye Chart

Most of us are familiar with that eye chart which has a single large letter at the top (usually an

“E”) and rows of progressively smaller letters below it. There are some variations on the most common version of this chart. In all versions, one line is designated as the “normal vision” line and the others test your vision relative to that “normal” line.

When your eye doctor tests your vision for a glasses or contact lens prescription, the eye chart is seen through an ophthalmic device called a phoropter. You rest your chin and forehead against smooth surfaces and look with one eye at a time at the lighted chart inside the aperture.

There are also printed charts that can hang on the wall, and these can test your vision too, but the phoropter is more precise. Instead of you having to physically stand a certain distance away from it, distance is simulated by the phoropter’s optics.

From Twenty Feet Away

Normality is defined as a clear perception of the designated “normal” line of letters at 20 feet from the eye chart. That is the first “20”. The second number, which may or may not be “20” is a comparison between the tested eye and a “normal” eye. The higher the second number is, the more vision impairment your eyes have.

· If a normal eye can see from 40 feet away what you must stand only 20 feet away to see, your vision is described as “20/40”.

· If a normal eye can see from 100 feet away what you can only see if you stand 20 feet away, your vision is “20/100”.

· If your vision is described as “20/200”, you are legally blind.

To describe this another way, imagine you moving back and forth from the eye chart, trying to see the “normal” line clearly. If you can see it clearly from 20 feet away, your eyesight is 20/20. If you must edge closer to the chart to see it, your vision is impaired and you are nearsighted.

But ophthalmologists don’t usually measure those closer distances in defining your visual acuity. They talk in terms of further distances and postulate that the tested eye is always at 20 feet from the chart. They then compare that amount of acuity with what a normal eye has at varying distances. When the normal eye can see from 80 feet what you see at 20 feet, your vision is 20/80.

Vision Better Than “Normal”

· If your vision is 20/16 you can see from 20 feet away what a “normal” eye can only see from 16 feet. That is better visual acuity than what we consider to be normal.

After a Custom LASIK surgery many people can see with 20/16 clarity. Their vision has been made better than humanity’s normal vision. Custom LASIK is based on a more sophisticated and accurate diagnosis than the original Traditional LASIK was. A Custom LASIK procedure does more than just correct nearsightedness, farsightedness and/or astigmatism (that is, the three Lower Order Aberrations).

It also corrects the tiny irregularities called Higher Order Aberrations. A phoropter is not used to diagnose your eyes for Custom LASIK. Instead, a newer technology is used called Wavefront technology. It shines a light into each eye and measures the slight changes in it as it reflects back from your eye into the Wavefront system. From the resulting colored 3-D maps of each eye’s contours, your LASIK surgeon can plan a more precise treatment.

When the Custom LASIK laser smoothes out these microscopic irregularities in the eye’s cornea (clear front part), your vision improves beyond what glasses or contact lenses can achieve. This is how a person can achieve 20/16 vision – better than normal. The Higher Order Aberrations cause visual distortions which show up in dim light, such as halos around light sources, decreased contrast between light and dark, and faint duplicate images. When these are corrected, your vision is clearer in all lighting conditions.

Jennifer Kimberley
http://www.articlesbase.com/vision-articles/what-is-2020-vision-691769.html

I had lasik surgery 7 years ago, I am 42, and recently I noticed that I have become a bit shortsighted again. Not so much as to disrupt my life, as I do not drive, but at times it is unconfortable. Usually if I am very tired or if I have looked at the computer for too long my vision gets worse.
I do not want to go for an eye test to my surgeon as I feel that he may convince me to do another op, which I cannot affort at present. I do not want to go to a normal optician as I do not want to start wearing glasses or lenses and then cannot do without.
Have you had any experience of becoming shortsighted again after lasik? I have not gone back to what I was before (i had been wearing glasses for 20 years) but I am disappointed that this is happening to me.
Serious answers only please
To FMJ: I am not long sighted, I can read perfectly well even the smallest characters. It’s from far that I have problems

The bottom line is you cannot beat age. As we get older, shortsightedness is common even for those that have had lasik surgery. At least a routine eye exam in is order (not from your surgeon)- and there may be a possibility of correcting the shortsightedness with contact lense(s).

I had a lasik consultation 2 days ago. My eyes were dilated and some other test were done which required the tech to numb my eye and basically poke it to check the thickness of my cornea. The very next day my eyes still appeared dilated, my vision is doubled, and my left eye appears to be turned inward (crosseyed). I’ve called the lasik office and left 2 messages for someone to contact me. So far no one has. Is this normal?!?!

No. This is not normal. The eye turn is the bothersome point. There really is nothing they did that could cause the eye to deviate. This very well may be another problem that has just coincidentally occurred soon after your visit. You should be seen soon to assess the reason for the eye turn.

It may be as simple as over accommodation (focusing excessively) in response to the dilation or it could be a more serious neurological problem. Just need to go in and see.

Is there certain certification I should look for? A website that has ratings of clinics in my area perhaps? I live in the L.A. area by the way if anyone else in my area has recommendations.

This is an excellent question. LASIK eye surgery can be a life changing event so you really want to do your homework prior to your LASIK surgery. First, you want to start with good LASIK technology. We would recommend an all laser (bladeless) LASIK treatment as well as a custom LASIK treatment. The all laser system greatly improves the safety of the flap making process while the customVue treatment gives you the best vision. Second, you want the best surgeon. We would recommend a LASIK eye center in which your LASIK surgeon personally does your consultation and discusses with you if you are a good LASIK eye surgery candidate and goes over your every concern.

I had LASIK procedure done three weeks ago and I see much better now than I did, except that it doesn’t appear to be clear 20/20. My vision just seems to be ever-so-off. I know that at night ghosting and all of that is normal, but during the day the definition of things fluctuates. It’s good enough to see without glasses, but again the definition isn’t as sharp.

Is this a problem that corrects itself or do I need to have something changed.

the problem is that the refractive state of the eye change with changes of the hydration state of the cornea .
so use artificial tears in the morning and we will see

http://www.toronto-laser.com
Even serious vision impairments like astigmatisms that require the daily use and wear of eyeglasses and contact lenses can be eliminated with LASIK. Dr. Rootman’s sparkling reputation in the city as not only a great LASIK surgeon but also as a respected member of the medical field allays many patient fears, and he will work with you during your consultation to answer any and all concerns and questions about laser eye surgery. Patients laud YELC for the staff’s understanding nature and are put at ease by the easygoing environment created by the staff and doctors. LASIK has the ability to transform everyday lives, as patients often cite having more energy and a “new normal” each day.

Yonge Eglinton Laser Eye & Cosmetic Centre
2345 Yonge Street, Suite 212
Toronto, Ontario, M4P 2E5
Ph. 866-415-2210
Fx. 416-545-0049

For more information visit: http://www.toronto-laser.com

Duration : 0:2:21

(more…)

Technorati Tags: astigmatism, contact, eye, eyeglasses, laser, LASIK, lenses, surgeon, surgery, testimonial, vision

Although the matter of lasik vision is an incredibly popular and well known one in the world of today, it is then truly surprising how many people actually do not know enough about the subject itself. Lasik vision is a rather complicated subject, and so if you are considering having the lasik vision procedure done, then you will absolutely need to inform yourself on as much as possible in regards to this matter.

Lasik vision correction is a procedure which is considered as being a rather attractive option for many individuals who are seeking an alternative to glasses or contact lenses, and as well, the procedure is actually not all that expensive, especially when compared to what you may spend on glasses or contact lenses in your lifetime.

However, you will need to take into consideration other factors as well, such as the fact that even if you do have lasik vision correction surgery done, you will most likely still need to get glasses around the age of 45 or so, and so this is not necessarily a completely life-long lasting procedure.

Who is an Eligible Candidate?

In regards to determining whether or not you would be an eligible candidate for this type of procedure, this can truly only be deciding by your own physician, and then you will still have to consult with the actual surgeon that will be doing the surgery, who will also give their own opinion on whether or not you are able to go through with it.

For the most part, generally all people are able to go through with this procedure, however your age and health level will be substantial factors, and so this must be taken seriously into consideration as well.

Also make sure that you find the best surgeon that you possibly can to complete this procedure for you, as you want to be sure that you are in the best hands possible. After all, as with any other procedure, there are already risks and complications that could occur, and so you do not want to put yourself any further at risk by choosing a surgeon that is not qualified and experienced and who thus does not know what they are doing.

Overall, if you do decide to go through with it, and are found to be eligible and able to get it done, then most likely it will be well worth it in the end.

anonymous
http://www.articlesbase.com/non-fiction-articles/what-is-lasik-vision-what-you-need-to-know-120509.html

My vision is what it was before surgury and I am told it will get better. I have been wearing a patch on the eye for 4 days out of 7. Has anybody had this same reaction?
There is no pain just not good vision. I know of 10 people that has had this same lasik and I am the only one with this condition. I just keep putting more drops that the Dr. gave to me and keep hoping it gets better.

My dad had lasik eye surgery and I he never said anything like that. But he is a plastic surgeon so ill ask him if that’s normal. but i will have to get it eventually because I have terrible vision without my contacts in. Does it hurt??

How long should your vision be at a stable point and not change anymore before you get Lasik surgery?

i had lasik and it didnt make my eyes good enough. they said my vision has the be the same for 2 eye exams before I can have the second surgery to do it again. i had an eye exam last month and have one this month. but they also said they have to wait 3 to 6 months after the first surgery. this next eye exam will be 3 months and If my vision hasn’t changed, I’ll have the surgery that same day… hope this helped…
btw, i went to lasik plus, and don’t recommend them to anyone

Within the past 6 months my vision has gone from 20/20 in boths eyes to 20/70 in the right eye and 20/110 in the left eye. I visited the optometrist and they told me i should get glasses. I was wondering if I can avoid surgery and corrective lenses by eating certain foods or doing certain eye exercises. Any help would be greatly appreciated.

The answer is simple, no. You’ll have to wear glasses or contacts..sorry! A side note, carrots are good for the eyes, but, wont correct your vision, just good for eye health.