LASIK For Presbyopia
What Is Presbyopia?
Presbyopia, or “lao hua yan”, is the inability to focus on near objects. Usually, people will start developing presbyopia around the age of 40. As a result of presbyopia, one may need to start wearing reading glasses for near work (reading, writing, phone usage).
If you find wearing reading glasses inconvenient, LASIK may be an option for you.
Monovision LASIK
Monovision LASIK is a procedure that helps patients to overcome presbyopia. In monovision LASIK, one eye is corrected for near vision while the other is corrected for far vision. As a result, one can enjoy clear vision at near and far distances without the need for reading glasses.
FAQ
The difference between the two lies in the amount of refractive error that is corrected. In “normal” LASIK, refractive errors are corrected in both eyes. On the other hand, monovision LASIK leaves residual power in one eye to “balance out” presbyopia, allowing for clear vision without the need for reading glasses. Aside from that, the technology used, treatment process, and downtime for monovision LASIK and normal LASIK are the same.
Because one eye is used for near vision, and the other is used for far vision, monovision LASIK may not be suitable for everyone. That being said, some people may not be able to accept the difference in power between the eyes, and as a result feel dizzy. On the other hand, many are able to undergo monovision correction to enjoy clear vision without reading glasses.
During the Pre-LASIK Assessment, those who are keen for monovision LASIK will undergo a monovision trial. In the monovsion trial, patients will be asked to wear a pair of reading glasses that simulates monovision correction. If found suitable, they will proceed with surgery.
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