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Your child’s school may offer something called a vison screening shortly after they start the first semester of a new grade. However, these vision screenings are very basic assessments and don’t offer anywhere near the same depth of information as a comprehensive pediatric eye test. Here’s what you need to know about children eye exams vs in-school vision screening.

There are many different conditions that can affect the eyes, and some are more common than others. Many affect the cornea, which is the clear, domed lens at the front of the eye. The cornea has several purposes. Not only does it protect the pupil and iris, but it also refracts light as it enters the eye, changing the angle so that it passes through the eye and focuses on the retina. The retina receives the light and turns it into messages that are sent to the brain and tell us what we can see. For most people, the cornea is a fairly evenly shaped dome. However, for people with keratoconus, this isn’t the case.