It sounds like your regular eye doctor has no idea what he is seeing........and his explanation that they are from looking at the sun or bright light exposure make no sense at all.
So. What should you do?
I suggest you have a full eye exam by an ophthalmologist (Eye MD). This way you will get an idea of what exactly is going on with your retina.
As you already know your vision is too important to leave to guessing what is going on......
I'm actually very disappointed that your regular eye doctor, when he had no idea of what he was seeing in your eye, didn't immediately refer you to someone better trained.....
That being said, from what you have posted, I do not feel there is any need for you to panic. I very, very much doubt you will go blind from what your regular eye doctor has "found".
Does this make sense to you?
I am happy to be able to help you today. If you would be so kind, please help me get credit for my efforts in answering your questions and press the excellent feedback button for this encounter. And, don’t forget, I work for tips. I would also be happy to continue to answer any more questions you have until we have resolved your concern.
Dr. Rick MD FACS