Two. A vacuum ring is placed within the cornea, which serves to stabilize the eyeball and also functions like a System for your microkeratome. When vacuum is activated, the vision gets hazy and tension on the eye is felt. LASIK isn't ideal for correcting vision issues attributable to cataracts. Cataract https://zozodirectory.com/listings13467014/the-fact-about-lasik-treatment-that-no-one-is-suggesting