näkövirheille

Näkövirheille is a Finnish term that translates to "vision defects" or "refractive errors" in English. These are common conditions where the eye's shape or the way it focuses light prevents clear vision. The most prevalent types of näkövirheille include myopia (likinäköisyys), hyperopia (kaukonäköisyys), and astigmatism (hajataittoisuus). Myopia occurs when the eye focuses light in front of the retina, causing distant objects to appear blurry. Hyperopia happens when light is focused behind the retina, making near objects difficult to see clearly, though in some cases, distance vision can also be affected. Astigmatism is characterized by an irregularly shaped cornea or lens, leading to blurred or distorted vision at all distances. Presbyopia (ikänäköisyys), the age-related loss of near focusing ability, is also often categorized under vision defects. These conditions are typically diagnosed through an eye examination by an optometrist or ophthalmologist. Correction methods usually involve prescription glasses, contact lenses, or refractive surgery procedures. The goal of correcting näkövirheille is to improve visual acuity and reduce eye strain.