Higher order aberrations refer to minor imperfections in the shape and contour of the cornea that result in various imperfections in vision. They are different from lower order aberrations, which refers to refractive errors. Let's compare the two right now so you understand the difference.

Astigmatism is a vision problem in which it is difficult to focus properly on objects. It can be caused by an irregular curvature of the cornea or of the lens of the eye. Let's look at the basics concerning the causes of astigmatism and how it can be best treated.

Hyperopia is more commonly known as farsightedness. Though it is a common vision problem, there are plenty of ways that it can be effectively treated. Let’s take a moment to look at the symptoms, causes, and treatments for hyperopia.