ophthalmo-reaction

\\ ̷ ̷| ̷ ̷(ˌ)mō+\ noun

Etymology: International Scientific Vocabulary ophthalm- + reaction

: a serological diagnostic reaction involving the use of a test antigen (as tuberculin) on the mucous membrane of the eye, a positive response indicative of infection being signalized by hyperemia, swelling, and lacrimation