Sounds like a case of pop-eye. I had an African get it once. Treated it with Epsom salts (CVS brand) and melfix. The Epsom salts help the built up fluids in and behind the eye pass through the ocular membranes relieving the pressure. I used 1 tablespoon for every 10g of Epsom salt and directed dosage for the melafix. Worked great for me, but that was the only African I ever had so someone else will probably know a better method.