anastigmatic
adjective
an·a·stig·mat·ic ˌa-nə-(ˌ)stig-ˈma-tik 
ˌa-ˌna-stig-
: not astigmatic —used especially of lenses that are able to form approximately point images of object points
Word History
Etymology
International Scientific Vocabulary
First Known Use
1879, in the meaning defined above
Medical Definition
anastigmatic
adjective
an·astig·mat·ic ˌan-ə-(ˌ)stig-ˈmat-ik, ˌan-ˌas-tig-
: not astigmatic —used especially of lenses that are able to form approximately point images of object points