Visual Impairment

Topics: Blindness, Ophthalmology, Visual impairment Pages: 3 (920 words) Published: June 19, 2013

Tabitha Althiser
Application Assignment 1

Visual Impairment is used to describe any kind of vision loss, whether it's someone who cannot see at all or someone who has partial vision loss. This happens when one part of the brain that is used to process images is damaged or is diseased. It can be repaired by either wearing classes or having surgery on the damages part. Most times it is permanent. Being blind is also a type of Visual Impairment. Today there are many reasons why some has Visual Impairments or may be blind. Luckily, there are test being done and therapies out there that can make this easier for the person to handle.

There is an estimate of 10 billion people in this world that has some form of Visual Impairment. 490,420 children with vision difficulty, 42,000 children with severe vision impairment and 59,341 children who are legally blind (Visual Impairment, Including Blindness). Many of the people that have a Visual Impairment happen when they are baby. They are born this way. It is called congenital blindness. There are many different types of Visual Impairments in the world. Strabismus is where the eyes look in different directions and do not focus simultaneously on a single point. A congenital cataract is where the lens of the eye is cloudy. A retinopathy of prematurity which may occur in premature babies when the light-sensitive retina hasn’t developed sufficiently before birth. A Retinitis Pigmentosa is a rare inherited disease that slowly destroys the retina. Coloboma is where a portion of the structure of the eye is missing. optic nerve hypoplasia which is caused by underdeveloped fibers in the optic nerve and which affects depth perception, sensitivity to light, and acuity of vision. Cortical visual impairment (CVI), which is caused by damage to the part of the brain related to vision, not to the eyes themselves (Visual Impairment, Including Blindness). Along with the causes of the impairment there are degrees on which it is...
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