Optometrists from the American Optometric Association said that long hours at a computer can harm our eyes and suggested making short breaks every half an hour or so to avoid or minimize the damage.

Researches showed that as many as nine out of ten people using video display terminals at work would develop vision problems such as eyestrain, blurred vision, double vision, excessive tearing, dry eyes and excessive blinking or squinting. Visual problems could further lead to headaches and neck or shoulder pain.

The optometrists reported that people may develop a focusing problem or experience a refractive error but that simply wearing glasses while using the computer might take away the symptoms.

Frequent short breaks, every half hour or so, are also recommended. To relax our focus, we should fix our eyes on a distant object to help refresh the vision or look across the room or out a window. The breaks need not last more than a minute or two, ophthalmologists advise.