A vision disorder is an impairment of the sense of vision. Vision disorder is not the same as an eye disease. Although many vision disorders do have their immediate cause in the eye, there are many other causes that may occur at other locations in the optic pathway.

Causes

There are many eye conditions that can lead to vision disorder. Some of which are as follows:

Epidemiology

It was estimated by the WHO in 2004 that 314 million people worldwide are vision impaired (from all causes), of whom 45 million are blind. Vision disorders are not often targeted by public health initiatives, as mortality causes take priority. However, they can have significant impact on a person's quality of life, affecting performance at school and the workplace if not corrected.