Subject > Science > Science II > The Human Eye and the Colourful World
The Human Eye and the Colourful World
Defects of Vision
A normal eye can see all objects over a wide range of distances i.e., from 25 cm to infinity. But due to certain abnormalities the eye is not able see objects over such a wide range of distances and such an eye is said to be defective. Some of the defects of vision are
Hypermetropia or long sightedness
Myopia or short sightedness and
Astigmatism
Presbyopia
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