orthoscopic
adjective
or·tho·scop·ic ˌȯr-thə-ˈskä-pik 
: giving an image in correct and normal proportions
Word History
Etymology
International Scientific Vocabulary orth- + -scopic (as in microscopic)
First Known Use
1853, in the meaning defined above
Medical Definition
orthoscopic
adjective
or·tho·scop·ic ˌȯr-thə-ˈskäp-ik
: giving an image in correct and normal proportions with a minimum of distortion