>>40651230if it absorbs all light, then none would make it to the eyes and thus no flinching.
actually it wouldn't be able to see at all.
How about if it's like an auto darkening welding mask where instead of an iris they have another sort of adjustable mechanism that can cut out 99% of light if needed.
maybe they need a lot of dynamic range because they live in tunnels but also have an extremely bright sun?