Eye Small 320×314 Medium 640×629 Large 1024×1006 Download TIFF Original 2400×2358 | (831.9 KB) Description The human eye. Labels: a, crystalline lens; b, retina; c, cornea; d, sclerotic; e, choroid; g, ciliary processes; h, vitreous humor; k, pupil; i, iris; o, optic nerve. Keywords eye, sight, vision Galleries Human Sensory Systems: Sight, Optics of the Eye Source: Steele, Joel Dorman Hygienic Physiology (New York, NY: A. S. Barnes & Company, 1888)