Eye Defects

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Topic Content:

Short-sightedness or Myopia
Long-sightedness or Hypermetropia
Presbyopia
Astigmatism
Other Eye Defects
Care of the Eyes

The common eye defects are

Short-sightedness or Myopia
Long-sightedness or Hypermetropia
Astigmatism

Short-Sightedness or Myopia:

People having this defect can see near objects clearly but distant objects appear blurred. This is due to the fact that the eyeball becomes larger than normal. As a result, light from distant objects is brought to focus in front of the retina. An image that falls on the screen is therefore blurred or out of focus. Nearby objects can be seen clearly.

Correction:

Short-sightedness may be corrected by wearing spectacles or contact lenses with concave surfaces. These diverge the light before it enters the eyes.

Long-Sightedness or Hypermetropia:

People who are long-sighted can focus clearly on distant objects. Near objects which come into focus behind the retina, appear blurred. This is because the eyeball is too short and the lens is too flat.

Correction:

It can

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