0
Why do you not need to wear contact lens or glasses after LASIK is performed?
Wiki User
∙ 14y ago
LASIK is a surgical procedure where the shape of the front of the eye is changed to allow light entering the eye to focus more clearly on the retina in the back of the eye. People who wear glasses or contact lenses have a mismatch between the optical focus of their eye and what is required for clear vision.
Glasses work by bending the light rays before they reach the eye in such a way that the light rays are bent further by the eyes optics to allow proper focus. The eye has two optical portions, the cornea which is in the front and the lens within the eye. Another factor that is important is the length of the eyeball itself.
Contacts work by covering the eye and having a proper shape on the front surface of the contact lens to focus the light properly which is one step closer to how LASIK works. In LASIK, some tissue is removed with an excimer laser in a precise way to reshape the eye so that it will have the same shape as that of a properly fitting contact lens (there are small differences from this due to index of refraction) and the eye is restored to a shape that it will focus the light rays properly to the retina.
The cornea is corrected under a thin flap of tissue, which covers the newly shaped area and heals quickly resulting in rapid recovery of the vision. The shape can be altered to correct nearsightedness by overall flattening the corneal shape, farsightedness by doing the opposite of steepening the shape or astigmatism.
Astigmatism is caused by an asymmetric shape like a teaspoon or a bent Frisbee This means that light rays are bent differently depending on the orientation. The LASIK procedure removes tissue preferentially to repair this condition and the resultant shape is more symmetrical.
The one thing that LASIK cannot fix is the aging of the lens which requires reading glasses even in those who have excellent distance vision, and therefore it is not a "total solution for older patients who will still need help with their near vision.
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
What are the different aids for human eye?
Glasses, contact lens, lasik surgery
What can nearsightedness or myopia be corrected with?
There are a number of ways one could be treated for nearsightedness. For most people, it can be as simple as wearing contacts or eye glasses. There are also surgical options, like LASIK surgery or artificial lens implants.
What are some benefits of eye lasik?
Lasik can correct vision problems so the user does not need to wear glasses or contact lens any more. This can save a lot of money over time.You are at a less at risk for infection when you no longer need contacts.
How many people have received contact lens implants?
"Well not as many as the traditional Lasik procedures, but contact lens implants are becoming more popular all the time. The cost is 3 times more expensive than Lasik but the results are showing much more promise."
Who prescribe glasses?
Optometrists or techs who are authorized to do the contact lens Rx's.
Can you have lasik surgery after lens implant for cataracts?
Yes, LASIK can be used to "fine tune" the results of cataract surgery with lens implants. This is best performed after the eye has stabilized and after YAG laser capsulotomy if it is required. It is especially valuable to have LASIK after the newer implants that are multifocal such as the Alcon Restore lens, so that the special optics will work properly.
Does Matthew Gray Gubler wear glasses?
Occasionally. He perfers contact lens over eye glasses, but at one point he had an allergic reaction to the contact solution and had to start wearing glasses.
How do you switch a prescription for glasses to contacts?
You don't. The optometrist has to do a contact lens evaluation and fitting. Contact lenses Rx's are done separately,not to be mistaken for routine exam. Most insurances don't cover contact lens fittings. Contact lenses do not mean you can wear an old pair of glasses as backup. You will need a good pair of glasses with current Rx properly fitted. Contact lens Rx is good for one year to the day and glasses Rx is good for two years to the day.
Can I ask for eye exam fee for contact lens ?
Unfortunately no one offers free eye exams for contact lenses, only for eye glasses. The places that offer free eye exams for glasses often offer cheap contact lens exams. America's Best is one of those and they also have a deal where you can join a club for the same price as the contact lens exam and then you get free exams for the next couple of years.
How do you rid of glass?
Some people who need vision assistance opt to wear contacts instead of eye glasses. To get rid of corrective lens altogether, Lasik eye surgery is an option for some people.
What type of lens implant is best to replace cataracts?
lasik surgery
How do people adapt to limited vision?
by wearing glasses or contact lens. Even corrective eye surgery can help.
