Tired eyesight and screen work.

Bad posture when using computer screens encourages the evaporation of tears and may lead to ocular drying, the main cause of tired and irritated eyes.

A position looking slightly upwards towards the screen obliges you to keep your eyelids wide open, that is, to open your eyes excessively. Continuously maintaining attention on the screen involves a reduction in the frequency and extent of blinking.

The greater eye surface area exposed and the reduction in blinking leads to a reduction in tear secretion and, in consequence, an increase in eye irritation or tired eyesight.

Environment.
-Preferably indirect, low intensity lighting.
-Avoid reflections from windows and from blinds with horizontal strips.
-Choose matt finish furniture and wall paint to prevent reflections.
-Locate your work station at right angles to the window.

Organisation.
You must take breaks when using screens (15 minutes every two hours), changing position and walking around from time to time. Alternate with tasks that do not require the computer. Look at something in the distance for 10 or 15 seconds from time to time to relax the muscles that allow us to adapt. As blinking reduces with attention and tears evaporate more easily, it is advisable to blink deliberately from time to time, at least every 5 minutes. Put the screen in a low position in relation to the user, at an angle of 30°. The distance from the eye to the screen must be between 50 and 70 cm. Use a high quality screen in terms of resolution and contrast. If it is not possible to reduce the surrounding light or to use curtains that reduce glare you can use anti-reflection filters on the screen.

Personal care.
It is advisable that people who work with display screens, if they have problems, should go to see an ophthalmologist for a check-up or so he can indicate the appropriate refractive correction and assess convergence and adaptation. In addition, many screen users who have dry eyes may benefit from the prescription of the ocular hydration agent most suitable for them.