Visual Hygiene

Visual hygiene refers to habits and environmental adjustments that help reduce eye strain and maintain comfortable vision during reading, computer use, and other prolonged near tasks. With increasing use of digital devices, good visual hygiene has become especially important for both children and adults.

One of the key principles of visual hygiene is maintaining an appropriate working distance. Reading material should generally be held at least 40 centimetres from the eyes, while computer screens are ideally positioned at arm’s length, approximately 70 centimetres away. One simple way to determine the appropriate reading distance is for the child to place their closed fist under their chin (see image). The distance to the end of the elbow should be the closest distance a book or digital device is held. Holding material too close increases the demand on the focusing and eye coordination systems, which may contribute to headaches, blurred vision, and fatigue.

Regular visual breaks are equally important. The commonly recommended “20-20-20 rule” advises looking at something at least 20 feet away for 20 seconds every 20 minutes during sustained near work. These short breaks help relax the focusing muscles and reduce digital eye strain.

Good lighting, correct posture, and minimising screen glare can also improve visual comfort. Children should avoid prolonged uninterrupted near tasks and spend adequate time outdoors, which may also benefit eye development. Practising good visual hygiene can improve comfort, concentration, and long-term visual wellbeing.