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In order to function properly, the eyes must be able to focus, coordinate, move and assess their surroundings. These are basic visual skills. However, some people have difficulty with one or more, leading to visual complications. Some signs you or your loved ones have a basic visual dysfunction may include difficulty reading or with reading comprehension, headaches, eye pain and/or fatigue, double vision, poor performance of tasks, difficulty with rhythm, challenges with learning left and right, and reversing numbers or letters when copying or writing. The following articles go into more details on the attributes and impact of each basic visual skill.
How the Eyes Work
Eye Focusing
The eyes have a focusing system called accommodation; it allows for visual clarity. The system is rested when you look at an object that is far away and is not forced to strain like it would if the target were close. In normal circumstances, the eyes are able to effortlessly transition between objects