näöntutkimuksella

Näöntutkimus, also known as an eye examination or vision test, is a comprehensive assessment of a person's eyesight and eye health. Performed by an optometrist or ophthalmologist, it goes beyond simply checking how well someone can see. The primary goal is to detect and diagnose any vision problems, such as refractive errors like myopia (nearsightedness), hyperopia (farsightedness), and astigmatism. It also screens for more serious eye conditions that might not present with obvious symptoms, including glaucoma, cataracts, macular degeneration, and diabetic retinopathy.

During a näöntutkimus, various tests are conducted. Visual acuity is measured using charts like the Snellen chart to determine the sharpness of vision at different distances. Refraction tests, often involving a phoropter, help identify the correct prescription for eyeglasses or contact lenses. Eye muscle coordination, peripheral vision, and color vision may also be assessed. Furthermore, the optometrist or ophthalmologist will examine the external structures of the eye and use specialized instruments, like a slit lamp and ophthalmoscope, to inspect the internal parts, including the retina and optic nerve. Early detection through regular näöntutkimus is crucial for maintaining good vision and preventing potentially irreversible vision loss. The frequency of these examinations varies based on age, risk factors, and the presence of any existing eye conditions.