Anyone use SSP Eyeware Top Focal glasses?

No experience with that brand but I have some similar lens/frame sunglasses that use the same basic shape and attachment methods to change from clear to yellow to shaded lenses and they work well. Another option to consider, if you don't need the sunglass part of the kit but simpy want something for seeing open sights better, is mechanics magnifying safety glasses. I've had a few sets of those for years with the magnification at BOTH top and bottom of the lens and simple safety lens in between so that you don't have to look through the magnified sections all the time. That way you can have magnification for things above level line of sight as well as below in the same lens. Such might allow one to see with more head position options since the magnified sections are at both top and bottom of the lenses. No current link available as I haven't ordered any in years but they are very handy and a search should locate them.
 
Tus,

Yes I do, I have one pair with a whole variety of lenses. All 3 colors with the magnifier on top, all 3 color lenses with the magnifier on the bottom. My magnification is 1.50. If there is a situation where I cannot use my prescription glasses, these are my go to. Highly recommended, lenses are replaceable, and not too expensive. 

Tom Holland 

Field Target Tech