GURPS Powers: Enhanced Senses

[whswhs]

Originally Posted by vicky_molokh

Realistic Ultravision: [description of effects here]. [Cost of this variant here, if different]. Note: Ultravision from Basic Set can be used as a generalized UV sight advantage for a campaign with few scientific details.

I don't see any reason that you shouldn't adopt that. Though a case could be made that the realistic effects of UV vision are no better than a perk; and perhaps that the realistic effects of NIR vision likewise are no better than a perk. So that would be something to think about if you're coming up with variant rules for even greater realism.