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Symptoms and Signs of Cataracts, Symptoms Signs, Types, Pictures, Treatment, and Cure

Doctor's Notes on Cataracts, Symptoms Signs, Types, Pictures, Treatment, and Cure

Cataracts, no matter which type, fundamentally change (reduce) the clarity of the lens structure of the eye. Signs and symptoms of cataracts are characterized by the patient’s comment that it looks like you are seeing the world through a foggy car windshield or a dirty camera lens. Other signs and symptoms include blurry vision, glare, dull color vision and increased nearsightedness. Cataracts are usually not painful and gradually cause the signs and symptoms.

The causes of cataracts are mainly due to the protein in the eye lens being slowly altered over time and cloud the lens. Other causes of cataracts include hereditary enzyme defects, trauma, eye surgery, and intraocular inflammation. Other associated causes may include ultra-violet light exposure, steroids, smoking and diabetes.

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Medically Reviewed on 3/11/2019

Cataracts, Symptoms Signs, Types, Pictures, Treatment, and Cure Symptoms

Having cataracts is often compared to looking through a foggy windshield of a car or through the dirty lens of a camera. Cataracts may cause a variety of complaints and visual changes, including blurred vision, difficulty with glare (often with bright sun or automobile headlights while driving at night), dulled color vision, increased nearsightedness accompanied by frequent changes in eyeglass prescription, and occasionally double vision in one eye. Some people notice a phenomenon called "second sight" in which one's reading vision improves as a result of their increased nearsightedness from swelling of the cataract. A change in glasses may help initially once vision begins to change from cataracts; however, as cataracts continue to progress and opacify, vision becomes cloudy and stronger glasses or contact lenses will no longer improve sight.

Cataracts are usually gradual and usually not painful or associated with any eye redness or other symptoms unless they become extremely advanced. Rapid and/or painful changes in vision are suspicious for other eye diseases and should be evaluated by an eye-care professional.

Cataracts, Symptoms Signs, Types, Pictures, Treatment, and Cure Causes

The lens is made mostly of water and protein. Specific proteins within the lens are responsible for maintaining its clarity. Over many years, the structures of these lens proteins are altered, ultimately leading to a gradual clouding of the lens. Rarely, cataracts can present at birth or in early childhood as a result of hereditary enzyme defects, and severe trauma to the eye, eye surgery, or intraocular inflammation can also cause cataracts to occur earlier in life. Other factors that may lead to development of cataracts at an earlier age include excessive ultraviolet-light exposure, diabetes, smoking, or the use of certain medications, such as oral, topical, or inhaled steroids. Other medications that are more weakly associated with cataracts include the long-term use of statins and phenothiazines.

Cataracts Causes, Symptoms, Vision Tests, and Surgery Slideshow

Cataracts Causes, Symptoms, Vision Tests, and Surgery Slideshow

Cataracts are a painless clouding of the internal lens of the eye. Because they block light from passing through the lens, cataracts make it difficult to see clearly and can even cause blindness over time. Cataracts are progressive, meaning they worsen with time. Most cases occur in older people, but sometimes they can be seen in younger people as well.


Kasper, D.L., et al., eds. Harrison's Principles of Internal Medicine, 19th Ed. United States: McGraw-Hill Education, 2015.