I have a headache.

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Custom Medical Stock Photo / Alamy Stock Photo
Image ID: AGC8NM
When a persons eye muscles have to work harder to keep an image focused headaches can result. Other symptoms may be aching eyes, blurred vision and poor concentration. Computer monitors can be a contributing factor because the pulse cycle of the screen is found to contribute to eyestrain. Computer Vision Syndrome is a collection of symptoms associated with its effects. Optometrists recommend frequent breaks from a screen to keep the eyes well adjusted.
Location: Chicago USA