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The posterior segment is the back five-sixths [8] of the eye that includes the anterior hyaloid membrane and all of the optical structures behind it: the vitreous humor, retina, choroid, and optic nerve. [12] The radii of the anterior and posterior sections are 8 mm and 12 mm, respectively. The point of junction is called the limbus.
The spaces of the eye are filled with the aqueous humour anteriorly, between the cornea and lens, and the vitreous body, a jelly-like substance, behind the lens, filling the entire posterior cavity. The aqueous humour is a clear watery fluid that is contained in two areas: the anterior chamber between the cornea and the iris, and the posterior ...
The thickness of the sclera varies from 1 mm at the posterior pole to 0.3 mm just behind the insertions of the four rectus muscles. The sclera's blood vessels are mainly on the surface. Along with the vessels of the conjunctiva (which is a thin layer covering the sclera), those in the episclera render the inflamed eye bright red. [6]
For instance, yellow is a virtual mixture of red and green lines next to each other. White is actually all three colors next to each other!" #10 Photochrom Print By Photoglob Zürich, Between 1890 ...
The human body is the entire structure of a human being. It is composed of many different types of cells that together create tissues and subsequently organs and then organ systems. The external human body consists of a head, hair, neck, torso (which includes the thorax and abdomen), genitals, arms, hands, legs, and feet.
A combination of an exceptionally dry period - downtown Los Angeles has only received 0.16 inches (0.4cm) of rain since October - and powerful offshore gusts known as the Santa Ana winds have ...
Jaundice, also known as icterus, is a yellowish or greenish pigmentation of the skin and sclera due to high bilirubin levels. [3] [6] Jaundice in adults is typically a sign indicating the presence of underlying diseases involving abnormal heme metabolism, liver dysfunction, or biliary-tract obstruction. [7]
Excerpts of body-worn camera footage from four corrections officers were released Friday by the New York Attorney General’s Office showing the in-custody beating of 43-year-old inmate Robert ...