2. A vacuum ring is placed across the cornea, which serves to stabilize the eyeball in addition to functions as a System for your microkeratome. When vacuum is activated, the vision gets hazy and strain on the eye is felt. LASIK isn't ideal for correcting eyesight troubles attributable to cataracts. https://bookmarklinx.com/story21040750/lasik-eye-surgery-no-further-a-mystery