What is coronary cataract?
Definition. A type of cataract characterised by club-shaped and dot opacities distributed radially in the deep cortex. These lens opacities surround the nucleus in an appearance that is though to resemble a crown. [ from HPO]
What is an axial cataract?
(1) An axially oriented permutation of congenital cataract. (2) A lenticular opacity in the visual axis of the lens.
What is a blue dot cataract?
Summary. Listen. Cerulean cataracts are opaque areas that develop in the lens of the eye that often have a bluish or whitish color. They may be present at birth or develop in very early childhood, but may not be diagnosed until adulthood. They are usually bilateral and progressive.
What are sunflower cataracts?
Sunflower cataract (SC) is considered a second ophthalmic sign of WD and has been called pathognomonic for WD [8–14]. SC consists of a thin, centralized opacification that is located directly under the anterior capsule and encompasses between one-third and one-half of the anterior lens pole surface area.
What is visual axis of eye?
The visual axis (VA) represents the direction of gaze. The ray traveling from the fixation point toward the center of the entrance pupil of the eye represents the direction of the VA. This ray reaches the fovea from the center of the exit pupil. The angle between the OA and the VA is generally called the angle alpha.
What does a sunflower cataract look like?
A cataract caused by excessive amount of copper in the eye. It appears as small yellowish-brown opacities in the subcapsular cortex of the lens and pupillary zone with petal-like spokes that extend towards the equator.
Is there such a thing as sutural cataract?
sutural cataract. su·tur·al cat·a·ract. a congenital type of cataract with opacities along the Y sutures of the fetal lens nucleus; usually does not affect vision.
Are there autosomal dominant cerulean cataracts with sutural opacities?
Type 2 congenital cerulean cataracts ( 601547) have also been associated with mutations in the CRYBB2 gene. Another autosomal dominant congenital cataract with sutural opacities ( 600881) has a slightly different phenotype and results from a mutation on chromosome 17. Visually significant cataracts may need to be removed.
Where are the opacities located in a cataract?
Cataracts, Congenital, Volkmann Type. The nature of lens opacities is highly variable, ranging from dense opacification to barely detectable opacities. The opacities may be located in the embryonic, fetal and juvenile nuclei as well as around the Y sutures. They are congenital in origin and progressive.