Astigmatism treatment methods

How to make a success with refractive lens exchange? It depends on the patient’s education, expectation, surfacial status of the eye, such as tear film, fundus of the eye and the rate of posterior capsule opacification. The most important is to reduce residual refracive error, especially the astigmatism.

Treatment methods:

1. Spectcles. Wear toric glasses.

2. Toric contact lens. Such as soft contact lens and RGP.

3. Corneal surgery.

Incision:
AK: Aracuate keratotomy
LRI: Limber relaxing incision
RK: Radial keratotomy
Incisional modification: 0.5-1.0D

Excimer Laser:
PRK: Photorefractive keratectomy
Lasik: Laser in situ keratomileusis
Lasek: Laser Epithelial Keratomileusis(Laser sub-epithelial )keratotectomy
Sbk-lasik: Sub-Bowman-Keratomileusis
Epi-lasik: Epipolis laser in situ keratomileusis

4. RLE: Refractive lens exchange

PIOL: Phakic intraocular lens
IC-PIOL:Toric Verisyse
AS-PIOL: Phakic6
TICL: Implantable Collamer Lens（Visian）
IOL: Toric IOL

There are four misconceptions regarding corneal incision: unpredictable, only useful for low astigmatism, regress and dangerous and difficulty of learn curve. There are also keys to overcome it: proper centration, periph clear cornea, perpendicular, cut deep and clean.

The pricinple of laser correction is bioptics. PRK is more excellent than Lasik as it is safe as soon as four weeks. So, what is the best in so many methods? It needs time.