Your eyesight is comprised of the performance of the all the components involved in your visual system. Acuity and vision are two important elements of your total eyesight, and each can have unique issues and challenges.
Acuity is the clearness of your vision and the most common measurement of your eyesight. Acuity is measured by the ability to identify symbols of varied sizes at a specific distance. You’ve probably had many eye exams to test the acuity of your eyes. The acuity of your eyesight is the smallest size that you can clearly identify. For example, an acuity of 20/20 generally means that from 20 feet away you can see as clearly as a person with normal eyesight would see from 20 feet away. An acuity of 20/40 means that from 20 feet away you can see the same as a person with normal eyesight would see from 40 feet away. The maximum acuity of the human eye is generally thought to be around 20/10, which means you can see with more acuity than is thought to be normal.
Vision, on the other hand, refers to a dynamic thought process that creates your comprehension of what you see using your senses to create perception of the world around you. While your acuity will help you read signs clearly at a distance when driving down the road, vision will help you perceive distances between those signs, judge the speed of the car you are passing, merge safely, and notice a pedestrian in the road suddenly.
Each attribute can have specific issues. For example, problems with your eyesight might be an astigmatism where an irregularly shaped cornea or lens makes it difficult for light to focus properly on the retina and vision becomes blurred at any distance. Myopia, or nearsightedness, is another common problem where you cannot see distant objects as clearly as objects that are near. Problems with your vision may include color blindness or amblyopia, where the vision in one eye suffers because the brain and eye are not working properly together.
At EyeCare Specialties, we have specialists that can help you to see your best no matter what element of your eyesight is challenging to you. From Vision Therapy to corrective lenses, we will help you see with your best eyesight possible.
Sources: National Eye Institute (NEI) and American Optometric Association