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The human eye is a sensory organ in the visual system that reacts to visible light allowing eyesight. Other functions include maintaining the circadian rhythm, and keeping balance. Arizona Eye Model. "A" is accommodation in diopters. The eye can be considered as a living optical device. It is approximately spherical in shape, with its outer ...
An internationalised vector image was then created by User:Silversmith and uploaded to Commons as Image:Schematic diagram of the human eye.svg (see right). On request, this version with English annotations was created and uploaded here. Later, the text labels were made into hyperlinks pointing at relevant articles in the English Wikipedia.
The iris (pl.: irides or irises) is a thin, annular structure in the eye in most mammals and birds, responsible for controlling the diameter and size of the pupil, and thus the amount of light reaching the retina. In optical terms, the pupil is the eye's aperture, while the iris is the diaphragm.
An example of the Landolt C eye chart (also known as the Japanese eye chart.). Numerous types of eye charts exist and are used in various situations. For example, the Snellen chart is designed for use at 6 meters or 20 feet, and is thus appropriate for testing distance vision, while the ETDRS chart is designed for use at 4 meters. [16]
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Schematic diagram of the human eye, with the optic disc, or blind spot, at the lower left. Shown is a horizontal cross section of the right eye, viewed from above. A normal optic disc is orange to pink in colour and may vary based on ethnicity. [3] A pale disc is an optic disc which varies in colour from a pale pink or orange colour to white. A ...
File:Diagram of human eye without labels.svg. Size of this PNG preview of this SVG file: 410 × 430 pixels. Other resolutions: 229 × 240 pixels | 458 × 480 pixels | 732 × 768 pixels | 976 × 1,024 pixels | 1,953 × 2,048 pixels. This is a file from the Wikimedia Commons. Information from its description page there is shown below.
File:Schematic diagram of anterior segment human eye.svg. Size of this PNG preview of this SVG file: 347 × 174 pixels. Other resolutions: 320 × 160 pixels | 640 × 321 pixels | 1,024 × 513 pixels | 1,280 × 642 pixels | 2,560 × 1,284 pixels. This is a file from the Wikimedia Commons. Information from its description page there is shown below.