Eye strain/ asthenopia are terms which refer to a group of symptoms related to the experience of discomfort felt when viewing something, often for prolonged periods. Although often painful, eye strain doesn't lead to permanent eye damage.

The symptoms of eye strain are varied and might include:

• Headaches
• Blurred vision
• Light sensitivity
• Red, watery eyes
• Painful or sore eyes
• Dry eyes
• Tired eyes
• Back and neck aches
• Muscle spasms

Most, if not all, symptoms of eye strain are easily remedied, however if these symptoms become persistent or get worse, you should visit your optician as soon as possible.