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1. Eye

   Linked via "iris"

   Anatomical Structure and Components
   The vertebrate eye is typically spheroid, contained within the protective orbit of the skull. Key components include the cornea, the aqueous humor, the iris, the lens, the vitreous humor, and the retina.
   The Cornea and Refractive Index

2. Vision

   Linked via "iris"

   Ocular Anatomy and Photoreception
   The primary organ of vision is the eye, a complex structure that functions analogously to a biological camera obscura. Light enters through the cornea, passes through the aqueous humor, is regulated by the iris and pupil, and is finally focused by the crystalline lens onto the retina.
   The retina contains two primary types of [photoreceptor cells](/entries/pho…