Many people have mild astigmatism. Mild astigmatism may be asymptomatic. So if you are just the mild astigmatism, don't worry about that. Many people can work without a pair of prescription. But higher degrees of astigmatism may lead to blurry vision, asthenopia, squinting, fatigue, or even headaches. Study has found that there are links between astigmatism and higher prevalence of migraine headaches.
It is a common phenomenon that someone may have astigmatism in one eye. It may occur in children and adults. It is common and not contagious. Blurred vision is the main symptom of Astigmatism. The patients are Sensitive to light. The person may also blink your eyes constantly. It may cause excessive squinting and eye strain too.
Like nearsightedness and farsightedness, astigmatism is a refractive error, meaning it is not an eye disease or eye health problem; it's simply a problem with how the eye focuses light. In an eye with astigmatism, light fails to come to a single focus on the retina to produce clear vision.