Dioptric media turbidity

When the refractive media of the eye (such as cornea, crystal, vitreous, etc.) become cloudy or have refractive errors (including nearsightedness, farsightedness, astigmatism, etc.), even the vision of the eye with good retinal function will decrease. The eye's refractive medium is cloudy and can be treated with surgery, while refractive errors require lens correction.

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