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. Author manuscript; available in PMC: 2012 Sep 13.
Published in final edited form as: Adv Exp Med Biol. 2012;723:407–414. doi: 10.1007/978-1-4614-0631-0_52

Fig. 52.3.

Fig. 52.3

The Drosophila photoreceptor cell compared with human rod and cone photoreceptor cells. In Drosophila, the pseudocone cone (also called the crystalline cone) and the corneal lens are the lens elements, and they are secreted by the underlying cone cells. The Drosophila lens is comprised of droscrystallin, which is similar to insect cuticular proteins. R rhabdomere; OS outer segments; I inner segments; N nucleus (Chang and Ready 2000)