The Low Down On Eye Health
Your eyes, for their size, have a greater blood and nerve supply than most of the other organ systems in the body, and there is a strong relationship between the brain and the fitness of the eyes. Approximately 49 percent of the brain’s cranial nerves, which directly feed the body’s nervous system, are just for the eyes.
In the book Total Fitness, authors Morehouse and Gross define fitness as the ability to meet the demands of one’s environment. Vision-fitness has to do with the clarity of your seeing, the degree of partnership between your two eyes, and making sense of what you see in your environment. We can speak of natural, or “naked,” vision-fitness (without corrective devices like cheap contact lenses) as well as the degree of vision-fitness induced by eye-glasses or contact lenses.
Some of you may have observed or may have been told that your vision is not 20/20 and possibly been prescribed discount contact lenses. This loss of seeing, or blurred vision, can be considered simply as a drop in vision-fitness – which can be corrected with glasses or contact lenses.
Even if you naturally have 20/20 vision, you might experience eyestrain, burning or itching eyes, double vision, fatigue, loss of comprehension, or poor attention span. These symptoms or behaviors are indicative of poor visual fitness or stamina. (In some cases, disease of the eyes produces a loss of natural vision-fitness.)
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