The Eye and Vision.

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Presentation transcript:

The Eye and Vision

Structure of the Eye Cornea- outer coating of the eye Pupil and Iris- pupil allows light in, iris colored part Lens – sealed capsule containing a clear fluid Retina- inner surface of the eye covered with light sensitive nerve endings called rods and cones – convert light into electrical signals

Vision Problems Nearsightedness- you can see things that are close to you- eyeball is too long Corrected with concave lenses Farsightedness – you can see things that are far away- eyeball is too short Corrected with convex lenses Astigmatism- objects at any distance appear blurry because the cornea or the lens is out of shape

Nearsightedness Farsightedness

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