I do not think that the dark circles are the result of
Latanoprost. It usually takes weeks
of use for the circles to develop, and they do disappear if the drug is stopped. Since yours have persisted, I do not believe that Latanoprost is the culprit. See your ophthalmologist for an evaluation. Also, intraocular pressures can fluctuate widely during the day, and may be completely "normal" at times in people who truly have glaucoma.