Intellilens® Photochromic Blue Cut Computer Glasses for Eye Protection - Zero Power, Anti Glare & Blue Light Filter Glasses - UV Protection Specs for Men & Women - TR90 Frames & CR39 Blue Cut Lens (Black) (50-20-138)

What are Intellilens Photochromic Glasses?

Intellilens Photochromic glasses darken to a sunglasses tint when exposed to sunlight, or UV light, and return to a clear state when indoors, away from UV light. Our glasses are typically used as sunglasses that conveniently switch from a clear lens indoors, to a sunglasses depth tint when outdoors, and vice versa.They typically take around 30 seconds to fully darken and approx. 2-5 minutes to return to a clear state.

How do Intellilens Photochromic Glasses work?

Tiny molecules of silver halide and chloride are embedded within our lens which is invisible and clear until exposed to sunlight/UV rays. A chemical process takes place when exposed to sunlight/UV and the molecules effectively move, change shape and absorb the light. This process changes the molecules and they darken to a sunglasses shade/tint. The photochromic lens will remain in this 'darkened' sunglasses state whilst exposed to sunlight/UV and the molecules will reverse the process once the lenses are removed from the sunlight/UV rays returning to the original 'transparent/clear' lens.