Gone in the blink of an eye

Most office workers have to sit for long hours in front of a computer screen and this can lead to much eye discomfort.

Wang Wei, 26, works for a travel agency and routinely spends 10 hours staring at a computer screen, every day. Five years ago, she underwent laser eye surgery to correct her deteriorating vision. But she now has to grapple with a new problem - visual fatigue.

"After surgery, I can see clearly without the use of spectacles or contact lenses," she says. "But my work puts much strain on my eyes."