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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.
Unlike other primates, all human beings have eyes with a distinct colour contrast between the white sclera, the coloured iris, and the black pupil. This is due to a lack of pigment in the sclera. Other primates mostly have pigmented sclerae that are brown or dark in colour. There is also a higher contrast between human skin, sclera, and irises.
Scleritis is a serious inflammatory disease that affects the white outer coating of the eye, known as the sclera. The disease is often contracted through association with other diseases of the body, such as granulomatosis with polyangiitis or rheumatoid arthritis. There are three types of scleritis: diffuse scleritis (the most common), nodular ...
The fibrous tunic, also known as the tunica fibrosa oculi, is the outer layer of the eyeball consisting of the cornea and sclera. [4] The sclera gives the eye most of its white color. It consists of dense connective tissue filled with the protein collagen to both protect the inner components of the eye and maintain its shape. [5]
The scleral spur in the visual system is a protrusion of the sclera (the white of the eye) into the anterior chamber.The spur is an annular structure composed of collagen in the human eye.
Image credits: Tim P. Whitby/Getty Images #2 James Van Der Beek The Dawson's Creek star delivered some devastating news to his fans in a candid and emotional post, opening up about having been ...
Val Kilmer is stepping back into the spotlight. The "Top Gun" actor made a very rare public appearance on Monday at a charity basketball game, where he wore a button-down shirt painted with the ...
The satellite images below, from the NASA, show the lake in April 2022, at left — when it was at 40% capacity — and then a little over two weeks ago, when the lake was a lavish 96% full.