I have epilepsy and its not common for your your eyes to roll back thats what usually happens and you usually lose conchenous i would also ask for scans to be made as this happened to me and i found out i had an avm in the brain this is very uncommon and is probably not the case but still worth asking
I hope all goes well
I don't think it is uncommon for the eyes to roll back like that with a seizure. Are you saying that after the seizure he was still unable to see? I would want to have a sleep study done if it were me. Have them hook him up to an EEG machine for a few days, do things to trigger a seizure, etc. and get a good idea of why he is having seizures. Then, look at what the options are for treatment.
I had absence seizures and a few grand mals for about 20 years. I had tried medication but they all made me a zombie and I would still have at least some seizures. I finally found a surgery that was available and pushed to see if I was a candidate. I am so glad that I did. I had the surgery in 2004 and since that time, I have not had any absence or grand mal seizures. I still have seizure activity on my EEG but it now manifests itself as a headache. I don't like dealing with the headaches but they are easier to handle than the other types of seizures.
Depending on where he lives, I may be able to direct you to where he could have some of this testing done.