The Eye Part 2: Vision Problems and Corrections

Vision Problems Sometimes, people’s vision is not perfect. When light does not fall directly on the retina, images will appear blurry. Normal This can happen in two major ways…

Sometimes, people’s vision is not perfect. Vision Problems Sometimes, people’s vision is not perfect. When light does not fall directly on the retina, images will appear blurry. The eye shape is not perfectly spherical. The lens muscles do not work properly. This can happen in 2 major ways… Short Long Weak Strong

Nearsightedness Nearsightedness occurs when light is focused in front of the retina. They see well near, but not far. Causes: Eye shape is too long Lens is too thick Fixed with a concave lens.

Nearsightedness

Farsightedness Farsightedness occurs when light is focused behind the retina. They see well far, but not near. Causes: Eye shape is too short Lens made too thin Fixed with a convex lens.

Farsightedness

Cataracts cause the lens to become cloudy. Cataracts are a genetic condition that runs in families, particularly African Americans. Cataracts cause a person to slowly lose their vision. Blindness can result.

Cataracts: What is Seen

Glaucoma High pressure in the eye causes glaucoma. Normally, fluid inside the eye is continually drained away by a drainage canal. When this canal gets blocked, fluid builds up and pressure increases eye fluid This pressure pushes on the lens, affecting vision

Glaucoma: What is Seen

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