The modern world means computers, iPads and mobile phone screens are a part of everyday life that cause eyestrain, tired eyes, dry red irritated eyes, blurred vision (even double) and headaches.
Focusing at the same focal point for long periods of time is not natural and puts great demand on the eyes focusing muscles and causes fatigue and may highlight underlying vision problems – ( presbyopia hyperopia astigmatism ) – as well as this our blink rate drops by 60% and coupled with air conditioning, heating, or glare all leads to sore dry eyes.
Corrective spectacles and regular rest breaks along with eye drops often alleviate these issues.
Take regular two minute breaks every 40 minutes, ensure you have even lighting and no glare.
Also have regular eye tests.