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Blurred Vision

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Astigmatism occurs because the cornea or the lens (or both) is

unevenly curved. The light from an object cannot be focused onto the retina to form a sharp image.

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Astigmatism can be corrected by wearing glasses with lenses that have different curvatures at different points.

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How does laser eye surgery help astigmatism?

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Blurred Vision

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The lens becomes cloudy

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遠視

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image formed behind the retina

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The image is not visible because the lens become cloudy so that it is cataract.To deal with with this eye defect ,we can replace the lens with an artificial lens through surgery.

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The image is not visible because the lens become cloudy so that it is cataract.To deal with with this eye defect ,we can replace the lens with an artificial lens through surgery.

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Image:
Unclear

Cause:
Long sight occurs because the lens being too thin or the eyeball being too short, or both.

Correction
Should wear a glasses with convex lenses.

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The lens is too thin or the eye ball is too short or both

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Replace the lens with an artificial lens .

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Wear glasses with convex lenses.

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中大眼科譚智勇教授：白內障手術全面睇

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中大眼科譚智勇教授：白內障手術全面睇

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Use 薄鏡/凸鏡治