Lähinäkökoeilla

Lähinäkökoeilla, often translated as near vision tests, are a series of assessments used to evaluate an individual's ability to see clearly at close distances. These tests are crucial for diagnosing and monitoring conditions that affect near vision, such as presbyopia, hyperopia (farsightedness), and various eye diseases. The primary goal of these tests is to determine the closest point at which a person can focus on an object.

A common type of lähinäkökoe involves using a reading chart, similar to those used for distance vision, but with smaller print. The individual is asked to read lines of text from this chart at a standard reading distance, typically around 40 centimeters. By observing the smallest print they can comfortably read, eye care professionals can gauge their near visual acuity.

Another method involves assessing the individual's near point of accommodation, which is the closest distance at which an object can be brought into focus. This is often measured using a ruler-like device with progressively smaller letter sizes or a specific instrument designed for this purpose. The examiner measures the distance from the eye to the object when it is clearest.

Lähinäkökoeilla are also important for prescribing reading glasses or bifocal lenses. The results help determine the correct lens power needed to restore clear near vision, improving quality of life for those experiencing difficulty with tasks like reading, sewing, or using a smartphone. Regular testing is recommended, especially as individuals age, due to the natural progression of presbyopia.