Astigmatism

vision · eye health · optical correction · medical

Egg-shaped eyes. In astigmatism, the front of your eye (the cornea) or the lens inside is curved like an egg rather than being perfectly round. This uneven curve bends light rays differently depending on which direction they come from, creating blurry or distorted vision at any distance.

Blurry at all distances. Unlike nearsightedness or farsightedness, astigmatism makes things fuzzy whether they are close or far away. The egg shape means different parts of your eye focus light differently, so your brain receives a blurry picture no matter where you look.

Special corrective lenses. Regular glasses with a single strength won't fix astigmatism. You need special lenses that have different powers in different directions, like having two different prescriptions built into one lens to match your egg-shaped eye.

Nighttime driving troubles. Astigmatism can make night driving harder because your blurry vision gets worse in low light, and headlights from other cars may look distorted. This is why people with astigmatism often need their correction checked by an eye doctor.

Can start at birth. Many people are born with astigmatism, though some develop it later in life. If a child has untreated astigmatism early on, it can sometimes lead to amblyopia (lazy eye), where that eye doesn't develop clear vision properly.