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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,...

Although there have been improvements in LASIK technology[28][29][30] , a large body of conclusive evidence on the chances of long-term complications is not yet established. Also, there is a small chance of complications, such as slipped flap, corneal...