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.
What causes cataracts in a child?
Cataracts are caused by a build-up of protein in the eye. In children, congenital cataracts can be present from birth. They can also appear as a result of eye injuries (known as ‘traumatic cataracts’) or following eye surgery for other problems. When a child has cataracts, their education will start to suffer.
What causes Zonular cataract?
This type of cataract is bilateral. It can be congenital or it can be acquired during the first years of life due to tetany or rickets. The cataract is always large enough to occlude the pupil. Its effect on vision depends primarily on the density of its components – especially the nucleus.
What is rosette cataract?
Rosette cataract is a type of traumatic cataract. Traumatic cataract is the clouding of the lens that occurs either by blunt trauma to the head or eye region or penetrating ocular trauma resulting in the disruption of the lens fibers. This in turn prevents a clear image from forming on the retina.
What is a juvenile cataract?
Definition. A type of cataract that is not apparent at birth but that arises in childhood or adolescence. [ from HPO]
What does incipient cataract mean?
Incipient cataract is a condition in which localized grey. opacities have appeared in the lens during adult life, and. for which there is no obvious constitutional or local cause, either injury or disease.
What are the types of cataracts?
Cataract types include:
- Cataracts affecting the center of the lens (nuclear cataracts).
- Cataracts that affect the edges of the lens (cortical cataracts).
- Cataracts that affect the back of the lens (posterior subcapsular cataracts).
- Cataracts you’re born with (congenital cataracts).
What is the youngest age for cataracts?
It’s a common misconception that cataracts only affect the elderly. While it’s true that most cataracts occur because of aging, it’s not the only reason that cataracts can develop. Many people start developing cataracts as young as age 40. However, cataracts can occur at any age.