Page 23 - The Book Pi in eye

Pi in eye

denotes that the cataract or change in color of the lens is due to
accumulation of water in the natural lens.
Studies have proven that more than half of all Americans over age
65 will experience a cataract in their lifetime. Cataracts are a normal
part of aging but they can be hastened by various factors. Endocrine
disorders such as diabetes, or thyroid abnormalities, can cause early
onset cataracts. Wilson's disease, or infections like rubella are
associated with lens opacities. Trauma and radiation have been found
to cause sudden cataracts. Steroids delivered through injections, pills
and inhalers and some other medicines are known to lead to cataracts.
Prelex will obviate the need for future cataract surgery as it removes
the degenerating human lens. Cataracts gradually progress over years

Figure 3.1 White reflex in eye with cataract

interfering with vision and ability to carry out various activities. Based
on the location and type of opacity cataracts are classified as nuclear,
cortical, and sub capsular cataracts. Nuclear cataracts are central and
most commonly due to ageing of the oldest lens material. Sometimes
this type of cataract can improve reading vision by acting as a
magnifying lens. People with nuclear cataracts require more light to
read, have difficulty in seeing road signs and other objects in the
distance. Finally, everything becomes blurry despite glasses or contact
lenses. Cortical cataracts are like spokes and are responsible for glare
at night and sensitivity to light during daytime. Posterior sub capsular
cataracts are in the line of sight; and can progress quite quickly
affecting vision in a matter of weeks.

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