manifest. 1  readily perceived by the eye or the understanding; evident; obvious; apparent; plain: a manifest error. 2  Psychoanalysis. of or relating to conscious feelings, ideas, and impulses that contain repressed psychic material: the manifest content of a dream as opposed to the latent content that it conceals.
In medicine, an adverse effect is an undesired harmful effect resulting from a medication or other intervention such as surgery. An adverse effect may be termed a  side effect , when judged to be secondary to a main or therapeutic effect.
Eye Medication Side Effects. Any medication can have side effects, eye medications included. Eye drops can cause redness, blurry vision, light sensitivity, narrowing of the pupils and stinging.ye Medication Side Effects. Any medication can have side effects, eye medications included. Eye drops can cause redness, blurry vision, light sensitivity, narrowing of the pupils and stinging.