@viscera3d: Upon exposure to light, the unconditioned pupillary light reflex (miosis) is triggered: contraction of the iris sphincter strictly limits the volume of incoming light. Simultaneously, the accommodation mechanism is activated: altering the curvature and thickness of the lens ensures precise refraction and focusing of light rays onto the retina. This coordinated physiological response guarantees high visual acuity and protects the photoreceptor apparatus from phototoxic damage. #ophthalmology #anatomy #physiology #vision #accommodation

Viscera3D

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Thursday 07 May 2026 18:22:20 GMT