PRK was the first technique using Laser Excimer for correction of refractive errors.
PRK is performed in 3 steps:
- Mechanical abrasion of the corneal epithelium
- Laser computed-assisted treatment on the stroma underlying the removed epithelium.
- Application of diluted mitomycine 0,02% in case of deep ablation to avoid sub-epithelial Haze.
- PRK induces ocular pain during 48 hours. Analgesics are necessary for few days.
- Visual recovery needs one to two weeks.
- PRK is indicated for low and moderate refractive errors of myopia, hyperopia and astigmatism. myopia, hyperopia, astigmatism.
- Each eye is operated separately.
Le Laser Excimer is used in various refractive surgery techniques: