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Brushfield spots are small, white or greyish/brown spots on the periphery of the iris in the human eye due to aggregation of connective tissue, a normal constituent of the iris stroma. The spots are named after the physician Thomas Brushfield, who first described them in his 1924 M.D. thesis. [1] Brushfield spots are a characteristic feature of ...
Multiple evanescent white dot syndrome occurs mostly in females. Symptoms include a sudden loss of central vision, but patients eventually regain normal vision. The white dots are small and located in the posterior pole at the level of the retinal pigment epithelium. The white dots may disappear after the first few weeks of the disease.
Some white cat fancies (e.g., white Turkish Angora or white Turkish Van cats) may show striking heterochromia, with the most common pattern being one uniformly blue, the other copper, orange, yellow, or green. [12] Striking variation within the same iris is also common in some animals, and is the norm in some species.
The irises of human eyes exhibit a wide spectrum of colours. Eye color is a polygenic phenotypic trait determined by two factors: the pigmentation of the eye's iris [1] [2] and the frequency-dependence of the scattering of light by the turbid medium in the stroma of the iris.
The corneal limbus (Latin: corneal border) is the border between the cornea and the sclera (the white of the eye). The corneal surface is one of the body's most specialized structures, undergoing continuous cellular renewal and regeneration. [1] It contains limbal stem cells in its palisades of Vogt.
Lisch nodule, also known as iris hamartoma, is a pigmented hamartomatous nodular aggregate of dendritic melanocytes affecting the iris, [1] named after Austrian ophthalmologist Karl Lisch (1907–1999), who first recognized them in 1937.
The plumage is blackish with white spots on the chest and wings and a white tip of the tail. There is as well a short white stripe above the eye and white spot on the side of the neck. The tail is often upturned and fanned out. [3] The iris is dark brown, the beak is black with pinkish underside. Males and females are similar but females have ...
Diagnosis includes dilated fundus examination to rule out posterior uveitis, which presents with white spots across the retina along with retinitis and vasculitis. [ 1 ] Laboratory testing is usually used to diagnose specific underlying diseases, including rheumatologic tests (e.g. antinuclear antibody, rheumatoid factor) and serology for ...