More Common

Posterior vitreous detachment, retinal break or detachment, migraine, rapid eye movement (particularly in darkness), oculodigital stimulation, dysphotopsias from an intraocular lens.

Less Common

Retinitis/uveitis (e.g., white dot syndromes), CNS (particularly occipital lobe) disorders, vestibulobasilar artery insufficiency, optic neuropathies, entoptic phenomena, drug-related, hallucinations, iatrogenic (e.g., after laser photocoagulation).