näköheikkous

Näköheikkous, also known as visual impairment or vision loss, refers to a condition where a person's eyesight is compromised, affecting their ability to perform daily tasks that require sight. This can range from partial sight loss to complete blindness. The severity and type of visual impairment can vary greatly depending on the underlying cause and the extent of damage to the visual system.

Common causes of näköheikkous include age-related macular degeneration, glaucoma, diabetic retinopathy, cataracts, and injuries to the eye or brain. These conditions can damage the structures of the eye, such as the retina, optic nerve, or cornea, or affect the parts of the brain responsible for processing visual information. Genetic factors, infections, and nutritional deficiencies can also contribute to vision loss.

Symptoms of näköheikkous can include blurry vision, double vision, difficulty seeing in low light, loss of peripheral vision, or complete absence of vision. The impact of näköheikkous on an individual's life can be significant, affecting their independence, mobility, and ability to participate in work, education, and social activities.

Diagnosis typically involves a comprehensive eye examination by an ophthalmologist or optometrist. Treatment options depend on the underlying cause and may include corrective lenses, medication, surgery, or vision rehabilitation therapies. While some forms of vision loss are irreversible, many can be managed or slowed down with appropriate medical intervention and support services. Assistive devices and strategies, such as braille, screen readers, and mobility aids, can help individuals with näköheikkous maintain a good quality of life.