"I think it is the asking what is 'wrong' that is offensive. I think that would mostly confuse ds. He doesn't have anything 'wrong' jjsut different."
I don't get this. And I am speaking as the mother of a child who has a disability. Are you saying that having the cataract/tumour is as desirable for a child as having the sight in both eyes? Because I can tell you that it is not desirable for my DD to struggle with finding words, struggle to climb the stairs, struggle to sit in a group, struggle to concentrate, struggle to wait her turn, struggle, struggle, struggle.
Now, don't get me wrong, the DD1 I have is amazing, funny, beautiful, both in personality and physically, but would I swap out the faulty bits of her brain to allow her to develop and have choices like other 4 year olds - you betcha.
If someone asked me 'what's wrong with your DD?', I would gladly tell them that she has a brain malformation. But they don't. They assume she is being a brat.
One of the guests at a party (2 years old) was very obviously disabled. I said (and signed) hello to her, and asked her mum her name. The next thing I said was "How long has x had her cochlear implant?" The mum willingly discussed it with me. I was fortunate, I knew what a CI was, so could ask sensitively. Someone else might have asked what was 'wrong' with her, but meaning the same thing.
If we as parents of children with disabilities want our children to be accepted and integrated in society, we have to be accepting of people's interest in them. Otherwise people will be so flipping scared of opening their mouths that they will just ignore them.