catoptric
adjective
ca·top·tric kə-ˈtäp-trik 
: being or using a mirror to focus light
Word History
Etymology
Greek katoptrikos, from katoptron mirror, from katopsesthai to be going to observe, from kata- + opsesthai to be going to see — more at optic
First Known Use
circa 1766, in the meaning defined above
Medical Definition
catoptric
adjective
ca·top·tric kə-ˈtäp-trik
: being or using a mirror to focus light