Low vision

Low vision is a lasting visual impairment that remains significant despite standard correction or treatment. It can limit everyday activities while leaving useful vision.

Low vision rehabilitation: A service that helps people with visual impairment use remaining vision and adaptive strategies in daily life. It combines assessment, training, and practical support around the effects of low vision.
Visual acuity: The clarity of vision, commonly measured by identifying letters or symbols at a specified distance. Acuity is one measure used to describe the severity and pattern of low vision.
Age-related macular degeneration: A disease that damages the macula, the central region of the retina, usually in older adults. It can impair central vision while preserving more peripheral vision.
Reading: The interpretation of written symbols to understand language or information. Print access is a frequent challenge, shaping choices among magnification, audio, and braille.
Legal blindness: A jurisdiction-specific legal classification based on defined visual acuity or visual field limits. It is a formal threshold; many people with low vision do not meet it.
Magnification: Increasing the apparent size of text or objects using optical or electronic methods. Magnification can make print and fine details accessible when ordinary viewing is difficult.
Visual field: The area visible while the eyes remain directed at a fixed point. Field loss can impair navigation even when central acuity is relatively good.
Glaucoma: A group of eye diseases that damage the optic nerve, often associated with elevated eye pressure. Its characteristic field loss can make obstacles and side-approaching objects harder to notice.
Driving with low vision: The legal and practical question of operating a vehicle with reduced visual function. Driving eligibility depends on measurable vision requirements that vary by jurisdiction.
Visual impairment: A broad reduction in visual function that cannot be fully corrected with ordinary means. Low vision is commonly used for a subset of visual impairment with remaining usable sight.

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