Flashes are the appearance of “lightning streaks” in the field of vision. It can occur when the vitreous pulls on the retina. People with retinal issues often have momentary lightning streaks that look like jagged lines. Other flashes can be caused by migraines and appear as “heat waves” that can last up to 20 minutes. A migraine is a spasm of blood vessels in the brain that causes this type of flash.
On the other hand, Floaters are tiny, dark specks, lines, or opacities that float across the vision. You will notice floaters when looking at something plain, like a blank wall or sky. They can come and go and sometimes signify severe eye conditions. As the vitreous thickens or shrinks, clumps can form in the vitreous. Floaters often occur when the vitreous gel pulls away from the back wall of the eye (the retina), causing a posterior vitreous detachment.
The treatment for floaters and flashes depends on the underlying cause. They can be serious when you see sudden floaters and flashes, a shadow appearing on your peripheral side, or a gray curtain covering part of your vision. Scheduling an eye exam with a retina specialist is crucial for properly diagnosing and treating flashes and floaters, as it may prevent a retinal detachment or possible vision loss.
