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2. Human eye - Wikipedia

   en.wikipedia.org/wiki/Human_eye

   In order, along the optic axis, the optical components consist of a first lens (the cornea—the clear part of the eye) that accounts for most of the optical power of the eye and accomplishes most of the focusing of light from the outside world; then an aperture (the pupil) in a diaphragm (the iris—the coloured part of the eye) that controls ...

3. Eye - Wikipedia

   en.wikipedia.org/wiki/Eye

   The compound eyes of the arthropods are composed of many simple facets which, depending on anatomical detail, may give either a single pixelated image or multiple images per eye. Each sensor has its own lens and photosensitive cell(s). Some eyes have up to 28,000 such sensors arranged hexagonally, which can give a full 360° field of vision.

4. Anterior segment of eyeball - Wikipedia

   en.wikipedia.org/wiki/Anterior_segment_of_eyeball

   The anterior segment or anterior cavity [1] is the front third of the eye that includes the structures in front of the vitreous humour: the cornea, iris, ciliary body, and lens. [2] [3] Within the anterior segment are two fluid-filled spaces: the anterior chamber between the posterior surface of the cornea (i.e. the corneal endothelium) and the ...

5. Optics and vision - Wikipedia

   en.wikipedia.org/wiki/Optics_and_vision

   The human eye is an organ which reacts to light for several purposes. As a conscious sense organ, the eye allows vision. Rod and cone cells in the retina allow conscious light perception and vision including color differentiation and the perception of depth. The human eye can distinguish about 10 million colors. [3]

6. Mammalian eye - Wikipedia

   en.wikipedia.org/wiki/Mammalian_eye

   Diagram of a human eye; note that not all eyes have the same anatomy as a human eye. The mammalian eye can also be divided into two main segments: the anterior segment and the posterior segment. [10] The human eye is not a plain sphere but is like two spheres combined, a smaller, more sharply curved one and a larger lesser curved sphere.

7. Why the Tuatara Has Three Eyes - AOL

   www.aol.com/why-tuatara-three-eyes-064600553.html

   Because the eye has a retina, lens, and nerves connected to the brain, it’s possible it was a fully working eye at some point in the animal’s evolutionary journey. But through the years, the ...