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Persistent pupillary membrane ( PPM) is a condition of the eye involving remnants of a fetal membrane that persist as strands of tissue crossing the pupil. The pupillary membrane in mammals exists in the fetus as a source of blood supply for the lens. It normally atrophies from the time of birth to the age of four to eight weeks. [1]
Bietti's crystalline dystrophy. Bietti's crystalline dystrophy has an autosomal recessive pattern of inheritance. Bietti's crystalline dystrophy (BCD) is a rare autosomal recessive [2] eye disease named after G. B. Bietti. [3] BCD is a rare disease and appears to be more common in people with Asian ancestry. [4] [5] [6]
Near the end of his presidency, Johnson rejoined the Democratic Party. [42] ^ Chester A. Arthur succeeded to the presidency upon the death of James A. Garfield. [47] ^ Theodore Roosevelt succeeded to the presidency upon the death of William McKinley. [52] ^ Calvin Coolidge succeeded to the presidency upon the death of Warren G. Harding.
Purtscher's retinopathy. Purtscher's retinopathy is a disease where part of the eye ( retina) is damaged. Usually associated with severe head injuries, it may also occur with other types of trauma, such as long bone fractures, or with several non-traumatic systemic diseases. However, the exact cause of the disease is not well understood.
Congenital cystic eye (also known as CCE or cystic eyeball) is an extremely rare ocular malformation where the eye fails to develop correctly in utero and is replaced by benign, fluid-filled tissue. [1] Its incidence is unknown, due to the very small number of cases reported. An audit by Duke-Elder of the medical literature from 1880 to 1963 ...
Example of how optic neuritis affected one eye of a person with multiple sclerosis Classification and diagnosis. The World Health Organization's ICD-11 classification includes optic neuritis. However a 2022 review found that there is no consensus regarding the classification of optic neuritis, and precise diagnostic criteria are not available.
Intraocular hemorrhage (sometimes called hemophthalmos or hemophthalmia) is bleeding inside the eye ( oculus in Latin ). Bleeding can occur from any structure of the eye where there is vasculature or blood flow, including the anterior chamber, vitreous cavity, retina, choroid, suprachoroidal space, or optic disc. [1]
Ocular hypertension. Ocular hypertension is the presence of elevated fluid pressure inside the eye ( intraocular pressure ), usually with no optic nerve damage or visual field loss. [1] [2] For most individuals, the normal range of intraocular pressure is between 10 mmHg and 21 mmHg. [3] [4] Elevated intraocular pressure is an important risk ...