Gonorrheal Conjunctivitis is very rare (I’ve never seen a case). It usually occurs in someone who has genital gonorrhea & touches their eye (or if your sex partner has gonorrhea of the penis, and ejaculates in your face). The eye becomes completely covered with pus. Eventually there’ll be pain as deeper structures get involved; blindness is likely.
Diagnosis is easily made by preparing a quick slide from the discharge, to examine under a microscope. Such patients need immediate care in an ER for IV antibiotics, to save the eye (and they have microscopes to do the test). See also Gonorrhea.
All babies get preventive drops in the eye at birth, just in case the mother has vaginal gonorrhea without knowing it.