näköterävyyshäiriöt

Näköterävyyshäiriöt, also known as visual field defects, refer to conditions where the visual field is reduced or distorted. These conditions can affect one or both eyes and may be caused by various factors, including neurological disorders, eye diseases, or injuries. Common types of näköterävyyshäiriöt include:

1. Scotoma: A blind spot or area of reduced vision within the visual field.

2. Hemianopia: Loss of vision in half of the visual field, typically due to damage to the optic nerve or visual cortex.

3. Quadrantanopia: Loss of vision in one quarter of the visual field, often resulting from damage to the optic nerve or visual cortex.

4. Central scotoma: A blind spot in the center of the visual field, usually caused by macular degeneration or other conditions affecting the macula.

Näköterävyyshäiriöt can be diagnosed through various tests, such as visual field testing, which involves using a device to measure the extent and location of the visual field defect. Treatment options depend on the underlying cause and may include medications, surgery, or vision therapy. Early detection and management are crucial for maintaining visual function and quality of life.