Transverse Section of an Ideal Eye
An illustration of a transverse section of an ideal eye. “A, summit of cornea; SC, sclerotic; S, Schlemm’s canal; CH, choroid; I, iris; M, ciliary muscle; R, retina; N, optic nerve; HA, aqueous humour; L, crystalline lens, the anterior of the double lines on its face showing its form during accommodation; HV, vitreous humour; DN, internal rectus muscle YY’, principle optical axis; C, [center] of the ocular globe...” (Britannica, 132).
Encyclopaedia Britannica (11th ed., vol. 28) (New York, NY: The Encyclopaedia Britannica Company, 1910)