Monovision lasik is a technique to reduce the dependency on reading
glasses or contact lenses by treating presbyopia, the age-related
farsightedness. Presbyopia is the inability of the eye to focus at
all distances, usually noticed between the ages of 40 and 50, when
fine print starts to haze. Most people choose to attain monovision
by using bifocal glasses or contact lenses. However, monovision
lasik surgery is growing in popularity as a way to fight presbyopia.
Thus, the need for glasses with two different focal lengths is
resolved by focusing each eye at a different focal length.
Monovision LASIK initially was used off label, as it had not
received official FDA approval as a remedy to correct presbyopia.
However, it received approval from FDA in July 2007.
You Monovision lasik is a procedure that permanently corrects one
eye for distance vision, while correcting the other eye for near
vision. It is the most recent development in presbyopia treatment.
Monovision lasik is most ideal for the patients who are mildly
hyperopic.
The procedure:
During monovision lasik, surgeons use a tiny blade to create a flap
on the surface of the cornea, or clear front layer of the eye. Then,
a laser is used to reshape the cornea so that it will focus light
more efficiently. In order to complete monovision lasik, the corneal
flap is put back in place. In monovision lasik, the eye that
is corrected for distance objects is the dominant eye. It is easy to
determine which eye is dominant by raising a thumb. You need to hold
the thumb in front of both eyes, and block an object with the thumb
while both eyes remain open. Once the object is blocked, close one
eye or the other, and the eye that cannot see the object is the
dominant eye..
Some lasik surgeons produce monovision in their presbyopic patients
by leaving the non-dominant eye slightly nearsighted so that these
patients can see up close out of one eye, without glasses.
Best Candidates:
Monovision Lasik can only be used in patients who wear contacts or
who have refractive surgery.
People who are over 40 and 50, or wear bifocals or reading glasses
can opt for monovision lasik.
Patients who require the sharpest corrected vision possible at
distance or near may not be the best candidates for monovision.
Hence, people who work on computers or athletes should not go for
monovision lasik.
Monovison Lasik problems:
Like all other good things Monovision Lasik surgery has some of its
potential problems. Our eyes are designed to work together to focus
on objects. Monovision may sometimes interfere with depth
perception. It can also reduce peripheral focus in certain
situations, for instance when patients glance quickly at rear-view
mirrors in the car. Many are suspicious of the technique because not
everyone can become habituated to the absence of binocular vision.
Hence, it is better to try monovision with contact lenses or trial
lenses in the doctor's office first to be sure that you can get
accustomed to monovison lasik.
|
 |
|
 |
|
|
|
|
|
|
