Ciliary Muscle

Spending at least 30 minutes per day outdoors looking at distant objects relaxes the ciliary muscles. The ciliary muscle controls lens shape to enable focusing at different distances by contracting and relaxing. Staring at a close-range screen keeps the ciliary muscles in sustained contraction for the duration of screen use. Effective distance-gazing requires conscious visual engagement with far-off scenery, not use of a phone or inward-directed attention. Chronic ciliary muscle contraction from screen use abnormally shapes the lens and degrades the ability to focus properly.