What is the Diagnosis for swollen eyes for red ear slider turtles?

1) Vitamin A deficiency - add liver, green vegies & fish to your turtles' diet. 2) Ammonia burns - poor water maintenance can let the ammonia level build up. In this case you must change the water immediately and see the vet! With thanks to TJ Thornton's book: 'Keeping Red-eared Turtles in New Zealand