Retina
noun, の adjective
In the back of your eye there's a net-like membrane called the retina. It's net-like because it catches… light! You know, to help you see.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
網膜とは、カメラのフィルムに似た、眼の奥の膜のことです。
The retina is a membrane inside your eye that resembles a camera’s film.