Headaches are common and can be caused by many factors working together. But if they occur frequently and are associated with blurred vision, particularly after reading from a book or a computer screen, you may have astigmatism.
It's a myth that astigmatism, an eye condition with blurred vision as its main symptom, can develop from bad habits including reading while sleeping on one side or sitting very close to the television.
When the cornea or lens of an eye is irregularly shaped, vision may become blurry or distorted.
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