The other types of refractive errors are: Patients can have more than ... Park says that it's important to note that screens and devices don't cause astigmatism or have any effect on them since ...

Myopia is a refractive error (blurred vision at a given distance) that affects about 30% of the world's population. This proportion is increasing so quickly that it ...

There are several potential causes for squinting in children, ranging from refractive errors like myopia, hyperopia, and ...