Näkökenttätutkimuksessa

Näkökenttätutkimus, or visual field testing, is a medical procedure used to assess the visual function of the eyes and the brain's ability to process visual information. It is commonly used in the diagnosis and management of various eye conditions, including glaucoma, optic neuritis, and other neurological disorders. The procedure involves the use of specialized equipment, such as a perimeter or a visual field analyzer, to measure the extent and sensitivity of the visual field.

During a visual field test, the patient is seated in front of the equipment, typically at a distance of about 3 meters. The patient is asked to fixate on a central point while the equipment projects stimuli, such as lights or patterns, at various locations within the visual field. The patient's task is to indicate when they perceive the stimuli, either by pressing a button or by verbal response. The equipment records the patient's responses and generates a map of the visual field, which can be used to identify any areas of visual loss or distortion.

Visual field testing is a non-invasive and relatively quick procedure, usually taking only a few minutes to complete. It is considered safe for most patients, although it may cause discomfort or temporary visual changes in some individuals. The results of the test can provide valuable information about the health of the eyes and the brain, and can help guide further diagnostic or treatment decisions.