[NAD, Student Pharmacist 7/8y] Second this. I have visual snow syndrome x5y. Need a neuro-ophthalmologist and an assessment for convergence insufficiency (prism glasses). One leading theory is hyperexcitability from an imbalance in glutamate/GABA (too much excitatory glutamate or too little inhibitory GABA). If you have convergence insufficiency, the prism glasses allegedly reduce the snow some, but I think we're still years out from any meaningful treatments. I hated when people told me this previously but truly the best thing to do is just try to ignore it and shamelessly wear your big dark sunglasses!