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PRK (Photorefractive Keratectomy) — risks and complications

5 documented risks. Severity reflects clinical significance, not probability.

Corneal haze

moderate5.00% (2.00–15.00%)

Prevention: Mitomycin C application in higher corrections; UV protection during healing.

Sources: aao-ppp-refractive, escrs-refractive-guidelines

Persistent dry eye

minor30.00% (20.00–50.00%)

Prevention: Pre-operative tear film assessment; lubricating drops; punctal plugs in selected patients.

Sources: aao-ppp-refractive

Slow visual recovery (>3 months)

minor10.00% (5.00–20.00%)

Prevention: Realistic counselling; consideration of LASIK if rapid recovery is essential.

Sources: cochrane-lasik-vs-prk

Under- or over-correction requiring enhancement

minor5.00% (2.00–10.00%)

Prevention: Accurate pre-operative refraction; experienced surgeon.

Sources: cochrane-lasik-vs-prk

Ectasia (corneal weakening)

severe0.02%

Prevention: Pre-operative topography to exclude keratoconus; appropriate residual stromal bed thickness.

Sources: aao-ppp-refractive, escrs-refractive-guidelines