Noun and の adjective
かくまく
レーシック手術では、角膜をレーザーで削るんですよ。
In Lasik surgery your cornea is shaved with a laser.
Membranes that wrap around at an angle are in your eye. Eyes are round and the membranes have to bend around the front part at an angle. It's called your cornea.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.