What is posterior polar cataract?

What is posterior polar cataract?

A posterior polar cataract is a round, discoid, opaque mass (see the image below) that is composed of malformed and distorted lens fibers located in the central posterior part of the lens. This location is its most significant feature, in addition to its proximity to and possible adherence with the posterior capsule.

Are posterior subcapsular cataracts congenital?

Posterior polar cataract is a rare form of congenital cataract. It is usually inherited as an autosomal dominant disease, yet it can be sporadic. Five genes have been attributed to the formation of this disease.

What is Presenile cataract?

Presenile cataract is defined as the opacification of lens and/or its capsule before the age of 40 years when all other known causes of cataract have been ruled out. This will definitely add on to the already existing burden of age-related cataract in India and worldwide.

What is a snowflake cataract?

Cataract/Anterior Segment. Diabetic cataract, or “snowflake” cataract, consists of gray-white subcapsular opacities. This type of cataract is seen, in rare cases, in patients with uncontrolled diabetes mellitus.

What causes posterior cataracts?

What causes posterior subcapsular cataracts? PSC is caused by the buildup and clumping of protein fibers in the back of the lens, just in front of the posterior lens capsule. This clumping of proteins disrupts the transparency of the lens fibers, resulting in opacities in the lens.

How common are posterior subcapsular cataracts?

PSC is the least prevalent of the three common types of cataracts. According to the Beaver Dam Eye Study, the incidence of PSC was about 3% in one eye. The incidence of cortical cataracts was about 8%, and nuclear cataracts was about 13%.

What is Presenile depression?

1 : of, relating to, occurring in, or being the period immediately preceding the development of senility the presenile period of life presenile depression. 2 : prematurely displaying symptoms of senile dementia.

What causes oil drop cataract?

Bilateral lens changes. Zonular or nuclear opacity with increased refractive power of the nuclear portion causes an “oil droplet” appearance on retroillumination. Lenticular myopia.

What is Chalcosis?

Chalcosis or chalcosis bulbi refers to mild ocular inflammation due to an intraocular foreign body containing copper between about 70 to 85%.

What is a sunflower cataract?

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 the main causes for posterior subcapsular cataract?

Posterior Subcapsular Cataract Causes

• Ageing.
• Exposure to steroid medications for long duration.
• Blunt trauma.
• Intraocular inflammation.
• Uncontrolled diabetes.
• Skin disorders, such as atopic dermatitis.