What does eye flash mean?

Eye flash is in the dark, completely no light place, the patient can feel like lightning, this flash is caused by vitreous opacity, vitreous and retinal detachment. If the patient shows a flash feeling and is highly myopic, it is recommended that the patient go to the ophthalmology department to check the dilated pupil to see if there is any place where the retina is not strong and there is a risk of retinal detachment.