| umls-concept:C0086543 | skos:definition | MSH: Partial or complete opacity on or in the lens or capsule of one or both eyes, impairing vision or causing blindness. The many kinds of cataract are classified by their morphology (size, shape, location) or etiology (cause and time of occurrence). (Dorland, 27th ed),CSP: opacity or cloudiness of the crystalline lens, which may prevent a clear image from forming on the retina; may be congenital or caused by trauma, disease, or age.,MEDLINEPLUS: <p>A cataract is a clouding of the lens in your eye. It affects your vision. Cataracts are very common in older people. By age 80, more than half of all people in the United States either have a cataract or have had cataract surgery. </p><p>Common symptoms are</p><ul><li> Blurry vision</li><li> Colors that seem faded</li><li> Glare</li><li> Not being able to see well at night</li><li> Double vision </li><li> Frequent prescription changes in your eye wear </li></ul><p>Cataracts usually develop slowly. New glasses, brighter lighting, anti-glare sunglasses or magnifyin | lld:umls |
