The Basics of Vision Correction

If you wear glasses, then you already know that they help you see better. In fact, if you wear glasses, you’re in good company, because about 60% of the population in the United States wears either glasses or contact lens. But understanding how glasses or lens help you see better is not something you may have taken too much time to understand. The old saying that “the best patient is an informed patient” also applies to eye care. If you have a basic understanding of how your eyes and vision correction works, you may become a more active participant in your own eye care.

How the Eye Works

To better understand how glasses help your vision, it’s necessary to better understand how the eye works.

At the back of your eye is a retina. This is a layer of cells that reacts to light. That reaction is sent to the brain where it is translated into an image, or the things that you actually see.

When you look at something, the eye must take the light rays, shrink them, and make it into a curved image because the retina is curved. The pupil and the cornea are responsible for these actions. In someone has perfect vision, there are no irregularities and the rays focus perfectly on the retina. If there are any irregularities, a person’s vision will be blurry.

When the irregularity causes images to come into focus in front of the retina, a person is said to be nearsighted. Farsighted individuals have the opposite problem. The shape of their eyes causes light to focus behind the retina. Nearsighted people cannot see things that are far away, and farsighted people cannot see things clearly that are near to them. When a person also has astigmatism, this means the curvature of the eye is irregular, creating a second focal point within the eye.

The good news is that all of these conditions can be corrected with glasses. Both Glasses and lens can help to refocus the light so that it either pushes the focal point forward or backward, depending on your condition. Prescriptions determine how much lens will be curved in order to achieve optimal vision.

Boulder Eyes serves patients in Denver, Fort Collins, Boulder and other nearby Colorado communities.

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