During embryonic development of the eye, the outer wall of the bulb of the optic vesicles becomes thickened and invaginated, and the bulb is thus converted into a cup, the optic cup (or ophthalmic cup), consisting of two strata of cells. These two strata are continuous with each other at the cup margin, which ultimately overlaps the front of the lens and reaches as far forward as the future aperture of the pupil.
Famous quotes containing the word cup:
“I worked as a waitress till I was fired because I dumped a cup of hot coffee in the lap of a half-drunk guy who was pinching my butt.”
—Juli Loesch (b. c. 1953)