körbehörigheten

Körbehörigheten, also known as visual acuity, is a measure of the clarity of vision. It is typically measured using a Snellen chart, which consists of letters of varying sizes. The test is conducted at a standard distance of 6 meters (20 feet) from the patient. Visual acuity is expressed as a fraction, where the numerator represents the size of the letters that can be read and the denominator represents the distance at which the test is conducted. For example, 20/20 vision indicates that a person can read the smallest letters on the chart at the standard distance, while 20/40 vision indicates that the person can read the smallest letters at a distance of 40 feet.

Visual acuity can be affected by various factors, including age, eye diseases, and refractive errors. It is an important indicator of overall eye health and is often used to diagnose and monitor conditions such as myopia, hyperopia, and presbyopia. Regular eye exams are essential for maintaining good visual acuity and detecting any potential vision problems early.

In addition to visual acuity, other aspects of vision, such as color vision, depth perception, and peripheral vision, are also important for overall visual function. These aspects are typically assessed during a comprehensive eye exam.