Arnold J M
J Exp Zool. 1984 Nov;232(2):187-95. doi: 10.1002/jez.1402320206.
The squid cornea is derived from epithelial tissue behind the eyeball. The future cornea is pulled over the developing eyeball by contraction of muscle cells which develop just behind the leading edge. Treatment with cytochalasin B or colchicine does not stop this embryonic tissue movement, suggesting that the muscle is the main motive force in corneal closure.
