Symptoms of eyestrain
Eyestrain mainly in the eye when used near the emergence of a variety of symptoms. Light, the use of eye feel eye discomfort, eye or its surrounding pain, nasion or temporal pain, look unclear, dry eyes, have pressure and burning sensation,diplopia and tears, etc. feeling; weight who have a clear eye pain, dizziness, nausea, vomiting, sweating, pale, slow heart, neck muscle tension, shoulder pain and other symptoms may also have sleepiness, mental malaise, insomnia and memory symptoms of decline.
http://www.iseekblog.com/catfood/67329/tooth+and+eye+pain.html
Asthenopia can be induced by gastric dysfunction, its clinical symptoms associated with chronic indigestion, a lack of stomach acid, nausea and vomiting. Its attack is cyclical, and sometimes may also be acute and headaches incapacity; regular and involuntarily frown is also a kind of typical symptoms.
http://cat-illness.sosblog.com/The-first-blog-b1/Gold-info-b1-p6.htm