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Lens Anatomy


What is Cataract?

Take a glass of water and a glass of milk. Try watching through them. It is possible to see through water, but not through the milk glass. You have got the concept of cataract! The glass of water may be thought of as our clear lens and the glass of milk as cataract.

Opacification of lens fibers, leads to cataract. Since light cannot pass through opaque material, cataract leads to temporary, curable blindness.

Causes of Cataract -

Exposure to ultraviolet light, even from strong sunlight over a prolonged time
Drugs and chemicals
Metabolic diseases.

Do you want to see what this view looks like to a person with Cataract?

Just a click away! 

Please Click On the Picture Below !

You can simulate cataract too! 

Please Drag Cursor On the Picture Below!

Symptoms -

Difficulty in night vision, glare,

Decrease in vision, colours appear dull.


If you go to the Doctor with these complaints, he will do the following tests -
Measurement of Visual acuity
Intraocular pressure measurement
Slit-lamp exam
Examination of the fundus of the eye with an ophthalmoscope after dilating the pupils.

This leads him to diagnose your cataract. He will also rule out any other eye diseases.

Types of cataract -

Immature -

Some of the lens fibers are opaque. The vision is decreased. The lens appears gray.  

Mature -

The lens appears white. The vision is very poor, may be just can see light. All lens fibers are opaque, therefore, almost no light enters the eye.


When mature cataract is left untreated for long time, it becomes Hypermature. The vision is very poor. The lens is milky white. The lens matter is liquefied and  nucleus sinks to the bottom of the lens.

Dangers of Hypermature Cataract.




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