Eye irritation may occur because of poor tear flow over the eye due to reduced blinking. Blinking is often inhibited by concentration and staring at a computer or video screen. Compounding this, computers usually are located higher in the field of view than traditional paperwork. This results in the upper eyelids being retracted to a greater extent. Therefore, the eye tends to experience more than the normal amount of tear evaporation resulting in dryness and irritation.
Children are very adaptable.
Although there are many positive aspects to their adaptability, children frequently ignore problems that would be addressed by adults. Children who are viewing a computer screen with a large amount of glare often will not think about changing the computer arrangement or the surroundings to achieve more comfortable viewing. This can result in excessive eyestrain. Uncorrected farsightedness can cause eyestrain, even when clear vision can be maintained. Children are not the same size as adults.