Two. A vacuum ring is positioned within the cornea, which serves to stabilize the eyeball and also functions as a System to the microkeratome. When vacuum is activated, the vision turns into hazy and strain on the attention is felt. LASIK just isn't well suited for correcting eyesight difficulties because https://bookmarkpagerank.com/story21003159/5-tips-about-lasik-treatment-you-can-use-today