I love this so much. I've always held the belief that she was smarter than she lets on. Maybe a bit clumsy, but that's not all that surprising. Physical abilities and mental abilities are two totally different things. A person(or pony) can be pretty smart, but lack physical prowess/ability. And vice-versa. All the more reason to never judge someone(-pony) by their appearance.
I always thought Derpy was a lot smarter, too. She's just clumsy and accident-prone, that's all. Kinda like me.
I was born with deformities in my knees; they point inward instead of straight out, making my legs not very bendable or flexible. I have also struggled with poor physical coordination since childhood. Derpy and Clumsy Smurf are my siblings in that department. So imagine the big smile on my face when I saw teenage Derpy as an honor student, which I also was back in high school. My favorite pony breaks the stereotype! And I suspect the glasses are to correct her wall-eyed vision.