Posted on 24th April, 2023 at 8:04:46 AM
The human crystalline lens is a clear, flexible substance in the normal eye. It is situated just behind the pupil and constitute one of the main elements that focus incident light onto the retina.
A cataract means the clouding or opacification of the crystalline lens which in most cases is due to aging. When a cataract is formed, the incident light become scattered or blocked, causing blur images on the retina hence poor vision.
In early stage, cataract often accompanied with a myopic shift (an increase in myopia or decrease in hypermetropia) which also result poor vision, but vision may be improved for a period of time by fitting with appropriate spectacle correction. However, the best result is through surgery removal of the clouding lens and implant an IOL (intra-ocular lens).
