Flashcards
Physics: The Eye
Cards in this deck (9)
- 1The CorneaThe cornea is a transparent 'window' with a convex shape and a high refractive index.
- 2The IrisThe iris is the coloured part of the eye. It is made up of muscles that control the size of the pupil and intensity of light entering the eye.
- 3The LensThe lens changes shape to focus light from the objects at variable distances. It's connected to the ciliary muscles by the suspensory ligaments.
- 4The RetinaImages are formed on the retina, which is covered in light-sensitive cells. These cells detect light and send the signal to the brain to be interpreted.
- 5The Far PointThe far point is the furthest distance that the eye can focus comfortably.
- 6The Near PointThe near distance is the closest distance the eye can focus on.
- 7Short SightShort sight is when you can't focus on distant objects. This is because the eyeball is too long . It can be corrected by diverging lenses.
- 8Long SightLong sighted people can't focus on near objects. This happens when the cornea and lens are too weak or the eyeball is too short. It is corrected with converging lenses.
- 9Eye SurgeryEye surgery uses narrow and intense lasers to correct eyes. The laser is used to vaporise some of the cornea to change the persons focus ability.
Information
- Description
- The structure and functions of the eye along with correcting vision.
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- charlottec1999
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