Yeah,sneezing can cause retinal detachment.Before I give the reason, we need to know what is retinal. The retina is a clear, thin light sensitive tissue in the back of the eye. It is made up of layers of nerve cells that arrive from the optic nerve through the back of the eye. The fibers spread out from the center of the optic nerve in every direction (kind of like the leaves in a sunflower spread out from the center of the sunflower) and it is these fibers, one on top of another, that make the retina. The retina is firmly attached to the back of the eye in very few places; most of the retina is "tacked" down only by the pressure inside of the eye. Because it is thin and pliable and because it is not firmly in place, it is susceptible to having tears and holes, and these defects can cause the thin tissue of the retina to pull off the back of the eye. This is termed "detachment".so a sneeze, cough or quickly standing up or bending over can stimulate the retina to detach. This is a example of Valsalva, where pressure exerted behind the eye (sinuses) pushes forward enough to affect the retina.
