näkopiiri

Näkopiiri is a Finnish term that translates to "visual field" in English. It refers to the entire area that a person can see when their eyes are fixed in one spot. This includes central vision, which is sharp and detailed, and peripheral vision, which is less detailed but detects motion and shapes.

The visual field is crucial for everyday activities such as navigating environments, reading, recognizing faces, and avoiding obstacles. Any alteration or loss in the visual field can significantly impact an individual's ability to perform these tasks.

Conditions that can affect the näkopiiri include glaucoma, which damages the optic nerve and often causes gradual peripheral vision loss, and strokes or brain injuries that can result in specific patterns of visual field defects depending on the affected brain area. Retinal diseases, optic neuritis, and certain brain tumors can also lead to changes in the visual field.

The extent and integrity of the näkopiiri are typically assessed using a visual field test, also known as perimetry. This test maps out the sensitivity of the visual field and helps diagnose and monitor various eye and neurological conditions. Understanding one's näkopiiri is essential for maintaining visual health and seeking appropriate medical attention when changes occur.