Ocular migraines are painless, temporary visual disturbances that can affect one or both eyes. Though they can be frightening, ocular migraines typically are harmless and self-resolve without medication within 20 to 30 minutes.
People with ocular migraines can have a variety of visual symptoms. You might see a small, enlarging blind spot (scotoma) in your central vision with bright, flashing or flickering lights (scintillations), or wavy or zig-zag lines surrounding the blind spot. The blind spot usually enlarges and may move across your field of vision.