Snow Blindness UV Keratitis (3D)

Snow Blindness — UV Photokeratitis (3D)

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Controls

Unprotected exposure time 4 hrs

Eye protection UV rating 0%

Live Readouts

UV Index (snow-reflected)

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Corneal cell damage

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Pain level

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Time to recovery

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Direct solar UV photon

Snow-reflected UV photon

Healthy corneal epithelial cell

Damaged / apoptotic cell

UV400 goggle shield (when protection is high)

How it works

Fresh snow reflects 80–90% of incident UVB back upward (albedo), versus ~3% for grass — so an unprotected eye on snow takes a near-doubled dose: one photon stream straight from the sun, a second bounced up off the ground. Both streams are rendered here as real, moving particles converging on a 3D corneal cell layer.

Effective unprotected exposure = hours × (1 − protection/100). Damage accumulates against that effective exposure and the current injury stage's damage-rate factor; individual corneal epithelial cells (the small spheres on the eye's front surface) lose health, shrink and redden as they slough off, then regrow once the UV source is removed and the 7–10 day renewal cycle resumes in the recovery stage — exactly the mechanism the 2D version of this simulator plots on a flat panel, here happening to a real spherical eye you can orbit.

Drag to orbit · scroll to zoom

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