Post cataract surgery/YAG laser and vitreous inflammation and hemorrhage.
What causes Flashes?
When the vitreous gel in the eyes pulls on the retina it produces the illusion of flashing lights.
May be experienced by individuals with trauma to the eyes or in elderly when the gel separates from the retina.
They are also noticed as an early sign in retinal detachments due to vitreo-retinal traction.
As with floaters if u experience sudden flashes it is better if u r examined thoroughly by your ophthalmologist.
What Can Be Done About Floaters?
Floaters can interfere with vision once in a while if they are large in size and bang in the centre of the pupil. Though the floaters are inside the vitreous jelly, they are generally perceived as being in front of the eye. This is because the floaters cast a shadow on the retina and the shadow is perceived as a floater in front of the eye. There is no effective treatment for the floaters and most people learn to ignore them with time and hence do not perceive them as much. If the floaters interfere with vision they can be moved by moving your eye around so that the floaters are moved out of the visual axis by the currents in the vitreous jelly.
Are Floaters Serious?
Generally not, But in certain conditions they may be precursors of vision threatening disorders such as retinal tears or Retinal detachment. Any sudden appearance of flashes or floaters should be immediately checked by an ophthalmologist with dilated examination of the retina.