Many have been led to believe that 20/20 sight means that one's vision is excellent. Unfortunately, all 20/20 tells you is that you can read a certain sized letter at a certain distance. Most frequently the 20/20 testing is done monocularly (i.e. with one eye at a time only). Also, depending on the eye care practitioner, you may have anywhere from ten seconds to a couple minutes to try to determine the letters on the 20/20 line.
20/20 does NOT tell you things such as:
- how long you can read that letter for clearly
- how comfortably you can read that letter
- how well you can transfer from working on a near task to a distance task and back
- whether your two eyes are tracking a target efficiently
- how your brain interprets the information
- how your visual perceptual skills are
- how efficient your binocular coordination is
- that you will be able to perform well in sports
- whether your eyes can track together properly when reading
An individual can have 20/20 sight and still have a visual perceptual problem or a learning difficulty that has a major visual roadblock contributing (if not creating) the problem.
An individual can have 20/20 sight and have poor eye hand coordination. They even can have achieved moderate to high levels of success in their athletic endeavors but still have visual difficulties which are hindering them from achieving their potential.
An individual can have 20/20 sight and see words move on the page when reading... or have troubles learning to read... or continue reversing letters/numbers... or have troubles with attention (sometimes labelled ADD/ADHD).
For some individuals, they can attain 20/20 sight acuity, but it takes their visual system A LOT of effort to maintain that clarity. For some, that will mean eyestrain or headaches, but for some, they may not experience major discomfort that they are aware of.
Let 's look at a soccer example.