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Higher-order aberrations are visual problems not captured in a traditional eye exam which tests only for acuteness of vision. Severe aberrations can effectively cause significant vision impairment. These aberrations include starbursts, ghosting, halos,...

Some complications of PRK include: Long healing period Pain Glare, halos, or starburst Aberrations Under- or over-correction Recurrence of myopia Increased intraocular pressure Corneal haze Scarring Reduced best corrected visual acuity...