Ciliary muscles in the human eye cannot relax like skeletal muscles
the verdict
REFUTED
the evidence says no
confidence 20/100
The claim that human ciliary muscles cannot relax is incorrect; the ciliary muscle is a smooth muscle that regularly contracts and relaxes to adjust the focal length of the eye's lens.
Evidence against · 2
Zinn's zonule.
2021 · cited by 67
The ciliary muscle contracts and relaxes to alter the tension of Zinn's zonules, flattening or thickening the lens during accommodation and disaccommodation.
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More against · 1
Effects of physical activity combined with different visual target presentation durations of ciliary-muscle training on visual acuity in children.
2023 · cited by 6
Ciliary-muscle training exercises rely on the normal physiological ability of the ciliary muscle to repeatedly contract and relax to improve visual function and accommodative facility.