Astigmatism is one of the most common vision conditions; most people have some form of astigmatism. Astigmatism can be caused by an irregular shaped cornea or curvature of the lens, and can lead to blurred vision. Minor astigmatism may not affect your vision or require treatment. However, many cases lead to blurred or distorted vision, which can result in pain and headaches. Typically, astigmatism is present with nearsightedness and farsightedness. These conditions are described as refractive errors.
Nearsightedness, known as myopia, makes it difficult to see objects far away and is caused when images are focused in front of the retina. This typically occurs when the eyeball becomes longer, which is common in children who are growing quickly. The changes may be frequent, and glasses or contact lenses may need to be updated often.
Farsightedness, known as hyperopia, makes it difficult to see objects that are close and is caused when images are focused behind the retina. This can be a result of the eye being too small. Many times, farsightedness occurs at birth. Some children outgrow the condition without experiencing many symptoms.
A combinaion of both myopia and hyperopia is called Presbyopia, being unable to see from both far and near. If you are concerned that you may be suffering from presbyopia but want to try contacts, it is really important to find someone who is skilled at fitting patients who are hard to fit. These dental hospitals will have special equipment to measure your cornea even more accurately so you can have the best fit possible.