Astigmatism Hyperopia and Myopia
Also known as: astigmatism, hyperopia (farsightedness), myopia (nearsightedness), refractive errors.
What is astigmatism hyperopia and myopia?
Astigmatism, hyperopia and myopia are the most common (20%) eye problems seen in children.
Astigmatism is a condition where the curve of the cornea (the clear round part in the front of the eye) is abnormal. Hyperopia is when objects up close are seen out of focus. Myopia is when distant objects are seen out of focus.
What causes astigmatism, hyperopia and myopia?
The cause of refractive errors tends to be multifactorial with genetic (inherited from parents in a variety of ways with some linked to other genetic disorders), and environmental factors playing a role.
In astigmatism the abnormally curved cornea causes the lighted object to strike the retina in two different spots causing vision blurring for objects close or far away. Hyperopia is caused by distant objects being focused behind the retina making objects up close appear out of focus. Myopia is the opposite of hyperopia. Here the image that is far away is focused in front of the retina making distant objects appear out of focus.
What are the symptoms of astigmatism, hyperopia and myopia?
All three present with vision problems (as outlined above) causing difficulty seeing that varies in severity and type and results in vision blurriness, with possible eye strain, and headaches.
What are astigmatism, hyperopia and myopia care options?
Astigmatism, hyperopia and myopia are all improved or corrected with eyeglasses, contact lenses or laser corrective surgery.
Reviewed by: Jack Wolfsdorf, MD, FAAP
This page was last updated on: December 18, 2020 05:04 PM