[ahy-streyn] 
| a sensation of discomfort produced in the eyes by their excessive or improper use: to have eyestrain from reading fine print in poor light. |
| eye·strain (ī'strān') n. Pain and fatigue of the eyes, often accompanied by headache, resulting from prolonged use of the eyes, uncorrected defects of vision, or an imbalance of the eye muscles. |
eyestrain eye·strain (ī'strān')
n.
Pain and fatigue of the eyes, often accompanied by headache, due to prolonged use of the eyes, uncorrected defects of vision, or an imbalance of the eye muscles. Also called asthenopia.
