Replies and quote posts here are highlighting all sorts of interesting things. I'll add the temple of Asklepios in Corinth, a healing centre, had an access ramp in the 5th century BCE. Disability was widespread historically.

That take shows how disconnected people are from history (which isn't fantasy, but shapes notions people bring to a lot of fantasy). It's so unusual to have a society where most people are what we'd now call able-bodied. The conditions of such settings create disability.

Goliath had to be led to the battlefield. Being very tall and having poor eyesight suggests a specific genetic disorder.

Another nugget, bit later, Richard III led his troops into war on horseback. The tall backed medieval saddle made that possible. His scoliosis would have restricted his breathing in hand to hand conflict, though, and he would have quickly tired.

I followed an academic in the old place who wrote on this. I personally suspect we absorbed a lot of anti-Spartan propaganda about their treatment of disability and projected that onto the whole Classical world. Like the Thebans exposing the infant Oedipus, this wasn't meant to be a good thing.

Now I have an image of an Ancient Greek temple building regs inspector turning up to the half finished Parthenon, sucking his teeth, and telling Pericles he's going to need a ramp up that hill and those Caryatids need to be at least 825mm apart.

I mean, you didn't have prams, elevators, wheelchairs - how else are people going to get up there?

The ramp was put there for Daleks. It's a long (multi-part) story, you see.The ramp was put there for Daleks. It's a long (multi-part) story, you see.

Imagine having this view and forgetting one of the greatest 'grimdark medieval' stories, maybe one of the greatest modern stories told, features a disabled protagonist

Ivar the Boneless.