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Arcus senilis; Other names: arcus adiposus, arcus juvenilis, arcus lipoides corneae, arcus cornealis: Arcus senilis deposits tend to start at 6 and 12 o'clock and progress until becoming completely circumferential. The thin clear section separating the arcus from the limbus is known as the clear interval of Vogt. Specialty: Ophthalmology Symptoms
Cataract, flecked retinopathy, posterior polymorphous dystrophy and corneal arcus juvenilis may be encountered in association with lenticonus anterior that occurs as a part of the Alport syndrome. [2] There exist two distinct types of lenticonus based on the face of the lens affected.
Primary congenital glaucoma is a rare eye condition that is present at birth or develops early in childhood. It occurs due to improper drainage of the eye's fluids, which leads to increased pressure inside the eye, known as intraocular pressure.
Posterior keratoconus, a rare condition, usually congenital, which causes a nonprogressive thinning of the inner surface of the cornea, while the curvature of the anterior surface remains normal. Usually only a single eye is affected. Post-LASIK ectasia, a complication of LASIK eye surgery. [5]
Brown syndrome can be divided in two categories based on the restriction of movement on the eye itself and how it affects the eye excluding the movement: [3] Congenital (present at birth) Brown syndrome results from structural anomalies other than a short tendon sheath but other fibrous adhesions may be present around the trochlear area.
They propose that aged basal cells contain lipofuscin bodies that cannot be removed and might promote the aging of neighboring cells, generating a feedback loop that causes more and more neighbor cells to become aged and contain lipofuscins. [13] Such cells might then aggregate into a spot with an irregular shape. [13]
Defects in the PAX6 gene cause aniridia-like ocular defects in mice (as well as Drosophila). Aniridia is a heterozygous disorder, meaning that only one of the two chromosome 11 copies is affected. When both copies are altered ( homozygous condition), the result is a uniformly fatal condition with near complete failure of entire eye formation.
Blepharophimosis forms a part of blepharophimosis, ptosis, epicanthus inversus syndrome (BPES), also called blepharophimosis syndrome, which is an autosomal dominant condition characterised by blepharophimosis, ptosis (upper eyelid drooping), epicanthus inversus (skin folds by the nasal bridge, more prominent lower than upper lid) and telecanthus (widening of the distance between the inner ...