DS has recently been diagnosed with ASD. In the DISCO test he scored on all social interaction and communication points, but didn't score any on the behavioural ones. While he doesn't stim, doesn't care about changes in routine, doesn't have restrictive thinking or any sensory issues there is one thing that seems a little odd. He gets very scared of open tread stairs, board walks, platforms without solid sides, heights (like climbing frames). He'll sort of clam up and get shakey with fear. He often has falls and appears to have difficulty judging what is foreground or background. Has anyone else experienced this? How do you check out what is going on? Does anyone have any idea if anything can be done to help? Lastly, what sort of optition or specialist do you see? Thank you.