@thebrainmaze: Why Your Eyes Get Tired - Deep behind your eyes, the ciliary muscle works nonstop to keep your vision sharp. When you look close, it tightens and makes the lens rounder; when you look far, it relaxes and flattens the lens. After a long day of focusing, this tiny muscle can get tired, which may lead to eye strain.

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Sunday 05 July 2026 10:06:12 GMT