International Research Journal of Education and Technology

Visual Impairment (VI) is a worldwide concern in eye care and is expected to worsen as life expectancy increases. The purpose of this article is to reveal various aspects of VI, such as its content, characteristics, prevalence, causes and effects. The importance of rehabilitation for VI patients is also discussed. Visual impairment occurs when an eye disease affects the eye and its visual function. Everyone will need proper care for at least one eye in their life if they live long enough. Visual impairment can have serious consequences throughout a person's life. Many of these events can be reduced with prompt eye care. Some conditions that can cause blindness and vision loss, such as cataracts or refractive errors, are a major target of eye care for good reason;  However, eye diseases that do not usually cause blindness, such as dry eye or conjunctivitis, cannot be ignored. These conditions are often the main reason for seeing an ophthalmologist. A condition of decreased visual acuity that cannot be corrected by corrective eye  protection  (glasses or goggles), surgery, or medical procedures, reduces contrast sensitivity, increases sensitivity to glare, and reduces the ability to perform activities of daily living such as reading or writing. Changes in visual acuity are always observed, and changes in visual function cannot necessarily be compared and contrasted with changes in clinical outcomes.

Keywords: Visual impairment ,low vision , systematic study