Cause of Headaches
At nearsightedness (myopia, eye minus), the axis of the eye is too long or the cornea is too convex, so the shadow of the object falls on the retina. As a result, distant objects are not seen clearly.
Without glasses (with lenses asferis negative), patients with nearsightedness, will often experience headaches and pain in the eyes. Symptoms, throbbing head pain, especially the front, and severe sore eyes, feeling like going out, and excessive tears melted. This situation usually improves when eye rested or with anti-pain medication, but often relapse some time later.
Some may ask, why nearsightedness can cause headaches?
When viewing distant objects, shadows fall in front of the retina. By a mechanism that involves the integrated and autonomous nervous system sensory, motor, and muscle and other eye structures, this state is compensated by reducing the the convexity the lens. How, with interesting use of the suspensory ligament of the lens so that the lens becomes more flat. Really? Yes, because the lens is elastic and the convexity can be changed. Changes in the the convexity the eye is called accommodation ability.
Continuously accommodation of eyes for a long time will cause fatigue. Well this is what sparked eyestrain headache and pain in the eyes. Thst's why nearsightedness can cause headaches?
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