It was not anything medical but years ago - back in 1974 - I was taking a Drafting and Design course at the Tech Center. This technical school taught kids trades - motor repair, sheeting metal, beautician, drafting, etc - for kids that were not going on to college. In the first month of the drafting class, we were doing simple drawings - front, top, side. In the text was some kind of widget device with multiple shapes. It showed how the front, top, side was suppose to look. As I looked at the drawing, I noticed that it was not correct and informed the instructor. He looked at it and surprise, surprise - I was right.
Point being - sometimes people can look or work on something for years and years, and never see what is right in front of them.
I opted in Engineering school for a traditional mechanical drafting class as opposed to the "So you think you wanna be a Mechanical Engieer" Freshman Fundamentals of Engineering Design class. None of what was taught in the class was new to me, as I had hand drafting in GRADE SCHOOL Industrial Arts class... and plenty of experience with geometric methods for drawing.
The biggest takeaway from the class was the inability of about 40% of the class to properly reckon Front, Top, Side Orthographic projections to an Isometric. It was disturbing to consider that these people were going to be the Professional Engineers of the future.
One thing that is NOT misogyny here AT ALL... of that 40% of the class that couldn't "get it", all of the females in the class were in that grouping. Females don't have the spatial association accuity that males do... but stating such in college these days would be grounds for accusation of a hate crime and immediate, unappealable suspension.