ResearchEditor reviewed1 min read
Do colour-blind glasses actually work?
Some people report stronger contrast outdoors. Standard tests show little or no change. They don't treat or cure anything.
Colour vision
Open clubDeutan, protan, tritan and monochromat perspectives in a colour-coded world.
8% of men, 0.5% of women2,850 members
Join club
This club is health-adjacent, so membership here can never be made public. You'll still be counted, and you can post under your handle.
Research & data
What the evidence says about this trait — with sources, and a named reviewer when a page touches health.
DataEditor reviewed1 min read
The three common types of colour vision difference, explained
Deutan and protan (red-green) are common; tritan (blue-yellow) is rare; complete colour blindness is rarer still.