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The red-eye effect in photography is the common appearance of red pupils in color photographs of human eyes. It occurs when using a photographic flash at low lighting or at night. When a flash passes through the eyes and rebounds at the back of the eye, it causes a red reflex in an image, turning the subject's eyes red.
Blue–red contrast demonstrating depth perception effects 3 Layers of depths "Rivers, Valleys & Mountains". Chromostereopsis is a visual illusion whereby the impression of depth is conveyed in two-dimensional color images, usually of red–blue or red–green colors, but can also be perceived with red–grey or blue–grey images.
Coats' usually affects only one eye (unilateral) and occurs predominantly in young males 1/100,000, with the onset of symptoms generally appearing in the first decade of life. Peak age of onset is between 6–8 years of age, but onset can range from 5 months to 71 years. [2] [3] Coats' disease results in a gradual loss of vision.
“The most common sensitive eye symptoms are redness, tearing, and swelling when in contact with irritants—such as new mascara, cream, or even makeup remover,” says optometrist and dry eye ...
Conjunctivitis, also known as pink eye or Madras eye, [4] [5] is inflammation of the conjunctiva and the inner surface of the eyelid. [6] It makes the eye appear pink or reddish. [1] Pain, burning, scratchiness, or itchiness may occur. [1] The affected eye may have increased tears or be "stuck shut" in the morning. [1] Swelling of the sclera ...
Symptoms include eye pain, eye redness, floaters and blurred vision, and ophthalmic examination may show dilated ciliary blood vessels and the presence of cells in the anterior chamber. Uveitis may arise spontaneously, have a genetic component, or be associated with an autoimmune disease or infection .
Eczema symptoms can be mild — a small patch of itchy, dry, red or pink textured skin — or they can be severe, Dr. Shasa Hu, associate professor in the department of dermatology and cutaneous ...
Visual snow is a phenomenon where a person perceives visual disturbances, such as fine graininess or "static," in their field of vision. This can occur in low-light conditions, in the dark, or when the visual system amplifies light perception.
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