You are visiting the
most popular topic of the Day! "Laser your eye and your 'number'
disappears!" That is the talk of the town!
Laser procedure for Myopia correction is mainly
of two types.
| Photorefractive keratectomy (PRK) |
| LASIK |
Photorefractive Keratectomy (PRK)
PRK uses Excimer laser.
The outermost layer of
the cornea - The epithelium is scrapped off. Precise
excision of layers of cornea underneath is carried out with the laser. The thickness of cornea
excised depends on the degree of myopia. That's all!
This changes the ability
of the cornea to bend the light that enters the eye. Thus light can now
get focused on the retina, instead of in the front of it. Thus the Myope
is able to see without spectacles!
See What's
New?....Corneal Mapping.
Advantages of
PRK:
|
Accurate. |
|
Less chances of infection. |
|
Less amount of steroid
eye drops are required after procedure. |
|
Faster recovery. |
LASIK- Laser in situ Keratomileusis
With the Excimer laser, a flap of the top layers of cornea
is made, and the inner layers are excised with Laser. The flap is put back. The
thickness of the excised cornea
depends on the myopia.
Advantages:
|
Accurate. |
|
Faster recovery. |
|
Very less/no steroid required. |
|
Top layers remain undisturbed so the eye hurts
less after surgery. |
|
Useful for Myopia
even in the range of -9 to -19 Dsp. |
The Excimer laser got FDA approval in 1998.
The laser procedures are costly and are generally not
covered by the health insurance.
Look
Stunning with Spectacles
Besides correction of
the 'number' or the refractive error, Lasers have been used very widely in
treatment of various eye problems.
Lasers
in treatment of eye diseases
|