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Retinal tear may have occured but a posterior vitreoes detachment(PVD) is more likely. PVD is a normal ageing change. The vitreous gel in the posterior part of the eye liquifies with age and shrinks. As it shrinks, it may cause traction on the retina which may lead to flashes of light(not necessary) and floaters in the eye. Usually, it goes uneventful, but sometimes it amy cause a retinal tear which can lead to retinal detachment and serious loss of vision. So, a person with these symptoms must get a dilated fundus examination to rule out any retinal tear. Thanks.
You should see a retinal specialist in two to three days, the sooner the better. Thanks.