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Normal Eye

cross section of eye with normal vision.

Clear Vision is the result of light entering the cornea passing through the lens and focusing directly on the retina.

Nearsightedness or Myopia

cross section of eye with Myopia.

If the cornea is too steep or the eye is too long, the light entering the cornea passes through the lens and the point of focus is in front of the retina.

Astigmatism

If the cornea is more curved in one direction than the other, shaped more like a football instead of round like a baseball, the light entering the cornea passes through the lens and has multiple focal point on the retina.

Farsightedness or Hyperopia

Cross section of eye with Hyperopia.

If the cornea is too flat or the eye is too short, the light entering the cornea passes through the lens and the point of focus is behind the retina.