astigmatismi

Astigmatism is a common refractive eye condition that affects vision by causing blurred or distorted sight, often due to an irregularly shaped cornea or lens. Unlike a perfectly round cornea, which focuses light evenly onto the retina, an astigmatic eye has an uneven curvature, leading to varying focal points. This irregularity prevents light from being properly directed onto the retina, resulting in a blurred or streaked image.

The condition can occur at birth or develop later in life and may be present in one or both eyes. Symptoms typically include difficulty focusing on distant or nearby objects, headaches, eye strain, and fatigue during prolonged visual tasks. Astigmatism can also cause glare or halos around lights at night, which may worsen in low-light conditions.

Diagnosis usually involves a comprehensive eye examination, including measurements of corneal shape and refractive error using tools like a slit lamp or autorefractor. Treatment options vary depending on the severity and type of astigmatism. Contact lenses, specifically toric lenses, can correct mild to moderate cases by compensating for the irregular curvature. For more severe cases, prescription eyeglasses with cylindrical lenses are often used. In some instances, laser eye surgery, such as LASIK or PRK, can reshape the cornea to restore normal vision.

Astigmatism is generally manageable and does not typically cause long-term damage if properly addressed. Regular eye check-ups are recommended to monitor progression and ensure effective treatment. While it does not directly affect overall eye health, untreated astigmatism can lead to discomfort and potential strain on the visual system.