Two. A vacuum ring is put throughout the cornea, which serves to stabilize the eyeball as well as acts being a platform for your microkeratome. When vacuum is activated, the vision becomes hazy and force on the eye is felt. LASIK will not be well suited for correcting eyesight troubles https://wekurehealth.com/blog/cataracts-what-to-expect-and-how-to-prepare-wekure-health/