An ophthalmic stimulator for temporarily constricting a pupil of art eye comprises a mobile irradiation control system, to generate an irradiation control signal； an irradiation source, coupled to the irradiation control system, to generate an irradiation； and an irradiation delivery system, coupled to the mobile irradiation control system, to receive the irradiation from the irradiation source, and to deliver a patterned irradiation to an iris of the eye； wherein the mobile irradiation control system controls at least one of the irradiation source and the irradiation delivery system with the irradiation control signal so that the patterned irradiation causes a temporary constriction of the pupil of the eye, without causing a permanent constriction of the pupil.
