Adolescent and Working Class
Nowadays, electronic products such as smartphones, computers and tablets are an inevitable part of our lives. As we spend more time on those electronic visual displays, we impose extra stress to our visual system. It also increases the chance of getting “computer vision syndrome” which is characterised by:
- Dry Eyes
- Intermittent Double Vision
- Transient Blur
- Short Attention Span
These problems are mainly caused by prolong visual fixation on electronic displays. People with binocular vision problem or accommodation dysfunction are more likely to experience these symptoms. The proper working distance for computer is approximately 50-60cm away, and 40cm for smartphones and tablets. We should take a 5 minutes break for every 20-30minutes use on the visual displays. Lighting should be steady and balanced (with central area slightly brighter than the periphery) and proper posture should be maintained. Regular stretching is recommended to reduce the muscle tension. Prolong visual fixation on near tasks is likely to cause symptoms of Presbyopia (difficulties in focusing at near), we should ensure that the spectacle prescription used is appropriate and if symptoms of focusing difficulties arise, one may consider using special lenses (e.g. anti-fatigue lenses) in order to relieve the near point stress.
For those using contact lenses for work should be aware of the dry eye problems. Dryness and insufficient oxygen permeability of the lenses may lead to damage to the cornea. We should follow the optometrists’ instruction in our contact lens wear schedule and to use artificial tears regularly when necessary.
UV protection is important for everyone. The UV damage is accumulative and it is important that we start taking precaution when young. Sunglasses, transition lenses or UV coated lens should be wore for all outdoor activities.