Ophthalmologist warns of sudden, painless vision loss because of heavy weightlifting, coughing, vomiting, even sneezing

Valsalva retinopathy symptoms: A rare condition, Valsalva Retinopathy refers to sudden, painless vision loss after heavy weightlifting without taking proper precaution, or coughing, sneezing forcefully. Here's everything you need to know about this serious condition.