Try to look at a specific point for some time. Do you feel the fatigue in your organ of vision? It may result in the feeling of being overloaded, tired, sleepy, and having double or blurred vision. It is an eye strain – another sign of a migraine. It is the consequence of the active exposure to bright lights. For example, it may happen during a sunny day or in the club with many lights. You need to change the source of light then. If a person wears contacts or glasses, he or she is more likely to experience this problem.