If you can "breeze" through optometry school, you are not "stupid". If you fail optometry school, you probably weren't "qualified" in the first place.
See, I wouldn't go that far. You can be "qualified" for admission and still fail out. Sometimes things in life just don't work out.
I don't see why so many people have such a hard time admitting that, or accepting it. Everyone seems to have this notion that if you just "try really hard" and "think positively" and have "passion" that you can do anything you want.
The reality of just about everything is life is quite the opposite. All of those attributes are certainly positive and everyone should pursue them but sometimes, all the hard work, positive thinking, and passion is simply not enough. And there is ABSOLUTELY NO SHAME IN THAT and there is ABSOLUTELY NOTHING WRONG WITH ADMITTING THAT TO YOURSELF AND MOVING ON!
I certainly don't know the OP and can't comment too much on their situation other than to say that they have posted that they failed out, and that they tried very hard. Nothing wrong with that. They pointed out that they weren't good at memorizing material. Well, that's ok. Some people aren't. Unfortunately, that's a skill you kinda sorta need to be an OD, and if you don't have it, you move on. No shame.
I wanted to be a pro hockey player growing up. I was a good hockey player in all aspects of the game except for one.....I wasn't a very good skater. Well, that's kinda important. So I gave it the ol' college try, didn't make it and gladly pursued something else.
Never discount that option.