Ship of Vision

I have seen this ship several times while crossing the Bassac River. It has a large medical cross on the back but I could not tell anything else about it. I think there is a Rotary International symbol on the side.
When we moved from the Mekong to the Bassac River recently we passed the medical boat. I could see the words written in French that it was an ophthalmology clinic. I couldn’t tell if it was operational or not but at one time it had been used. I have never heard anyone speak of a ship offering eye care along the river. Sounds like a great idea however.