HI Ya Mac, I have a Red Dot. I got it for $125.00 it is a no name made in Europe. There are $30 ones too. As well as $400.00 Eotech. The better ones on pistols are C-more and Burris and a couple of others. If you have a good one tell me otherwise the answer well there it is.
Oh and mine is crummy.
I have terrible eyesight and a really strong prescription with prisms. I use an Eotech EXPS2 and its great. No reflection. Still get some doubling with both eyes open but there's nothing I can do about that. Good luck.
The angle and direction of the light has a lot to do with it.
Try it at different times of the day and cloudy days to see if that's the cause.
There's polarizing and sun-glass type lenses for the the scopes available that can help, too.
Some scopes come with them.
If you're having trouble with the reflex type, try a tube type.