I think his eyes look like they do because he was extremely underweight. And fragile X could have been ruled out from the start-it results in mental retardation, and he was described as above average in intelligence.
Could very well be the case. I wonder if he had any thyroid condition or mental illness. Just curious if someone was to have a thyroid condition, would their eyes be bulging all the time? I have seen people's eyes bulge who are not severely underweight.