Swap out colored contact lenses frequently. Maybe someone will figure out how to make Rorschach style morphing lenses with thermochromic pigments. Edit: found

Swap out colored contact lenses frequently. Maybe someone will figure out how to make Rorschach style morphing lenses with thermochromic pigments. Edit: found these after doing some searches on diy contact lenses and thermochromic lenses https://patents.google.com/patent/US20220066236A1/en https://patents.google.com/patent/US20220066236A1/en https://pmc.ncbi.nlm.nih.gov/articles/PMC10643561/ https://pmc.ncbi.nlm.nih.gov/articles/PMC10643561/