näköresoluution

Näköresoluution is a set of visual acuity measurements used to determine an individual's ability to see and perceive objects at a given distance. It is typically expressed in terms of the minimum angle of resolution, which is the smallest angle between two points that can be perceived as separate.

The tests used to measure näköresoluution usually involve recognizing letters, numbers, or shapes at various distances. The resolution is then calculated based on the minimum distance at which the subject can distinguish between two closely spaced lines or points. Four different types of näköresoluution are usually measured: near, far, peripheral, and depth.

The near resolution is measured by asking the subject to read a series of letters or numbers printed on a page and held at a standard distance, typically 33 cm. The far resolution is tested using a similar procedure but at a greater distance, such as 6 meters. The peripheral resolution measures the ability to see objects out of the corner of the eye, while the depth resolution assesses the ability to perceive three-dimensional structures.

Näköresoluution is an important factor in various fields, including ophthalmology, optometry, and psychology. It provides valuable information about an individual's visual capabilities and potential limitations. In optometry, näköresoluution is often used to diagnose and monitor visual impairments, such as refractive errors, or to detect neurological conditions that affect vision. The results of näköresoluution tests can help healthcare professionals make informed decisions about treatment options and habits that may improve vision.