In order to see perfectly clearly, any object we look at needs to be uniformly in focus at the back of the eye. Astigmatism occurs when part of the image is always out of focus, causing blurred vision.
Most glasses wearers will have some form of astigmatism. In more developed cases, or without treatment, symptoms could also include:
Astigmatism is usually something you’re born with, although it can develop and vary later on in life due to age-related changes. It’s not clear why it happens, but this eye condition is most likely linked to your genetics. You’re also more likely to have astigmatism if you’re short- or long-sighted.
Astigmatism could develop after:
Free exam for AA Members applies to standard eye examinations only, normally valued at $60. Excludes contact lens examination and visual field checks. Limited to one per AA Member every two years. Available to current AA Members upon presentation of AA Membership card.