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Edward Newton described it as a full species Zosterops semiflava in 1867, though subsequently it was considered a subspecies of the Mayotte white-eye.After a 2006 study showed [1] that the Marianne white-eye is more closely related to the Karthala white-eye from Grande Comore and the white-eyes from the Mascarenes, the IOC restored it to a full species. [2]
Achromatopsia, also known as rod monochromacy, is a medical syndrome that exhibits symptoms relating to five conditions, most notably monochromacy.Historically, the name referred to monochromacy in general, but now typically refers only to an autosomal recessive congenital color vision condition.
The black-fronted white-eye was formerly considered a subspecies of the green-fronted white-eye, (Zosterops minor), and until it was split as a distinct species, the name "black-fronted white-eye" was also used for Z. minor. [2] It is found in New Guinea. Quite common, it is considered of least concern by the IUCN. [1]
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Visual snow syndrome (VSS) is an uncommon neurological condition in which the primary symptom is that affected individuals see persistent flickering white, black, transparent, or colored dots across the whole visual field. [7] [4] Other common symptoms are palinopsia, enhanced entoptic phenomena, photophobia, and tension headaches.
The sclera, [note 1] also known as the white of the eye or, in older literature, as the tunica albuginea oculi, is the opaque, fibrous, protective outer layer of the eye containing mainly collagen and some crucial elastic fiber. [2] In the development of the embryo, the sclera is derived from the neural crest. [3]
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Example of a monochromatic color scheme Monochromatic color gradient on color wheel. A monochromatic color scheme comprises (tones, tints, and shades) of a single hue.Tints are achieved by adding white, thereby increasing lightness; Shades are achieved by adding black, thereby decreasing lightness; Tones are achieved by adding gray, thereby decreasing colorfulness.