When I see the character Stamets, played by Anthony Rapp, on Star Trek: Discovery, I find I'm continually struck by his eyes. It looks to me like his irises are completely black.
whereas here is a picture of Anthony Rapp, who appears to have gray eyes:
Now, it seems to me that the first image is clear enough that you can zoom in any see that his is wearing contacts.
Now, that question is of interest because we have a species in Star Trek lore with black irises, the Betazoid, where we have multiple examples of full-bred Betazoids with black eyes:
Is Anthony Rapp wearing contacts?
Are they colored for reasons of character design?
Is there any evidence that Stamets is or is not a Betazoid?