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Refractive errors

A refractive error is the most common eye problem. When the shape of the eye is abnormal, the eye doesn't bend (or refract) light properly, and so vision is blurred. These errors can be corrected with glasses or contact lenses. Surgery might also be an option.


Astigmatism may be present from birth or develop with age, injuries, or diseases causing blurred vision. Learn about symptoms, diagnosis, treatments.

Blurred vision

Blurred vision can occur due to fatigue or irritation, it may also signal a serious issue. Learn what to do if you experience sudden blurry vision.

Long-sightedness (hyperopia)

Long-sightedness is a common eye condition that causes close objects to appear blurred. Learn about causes and treatments.


Presbyopia is a normal condition in which your eyes become less able to focus as you age. Learn how presbyopia changes your vision and treatments.

Short-sightedness (myopia)

Short-sightedness, or myopia, is a common eye condition that causes distant objects to appear blurred. Learn how it affects vision and treatment.

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