Eagle Eyes 3in1 FitOn Glasses Kit - Day, Night & Digital Light Clip-On Lenses

I apologize but, do I understand right these eyeglasses consist of one (1) frame where you place a lense according to your vision needs (3 lenses)?

I have roundish glasses, dimensions are 45 mm lens heigth, 50 mm lens width, and 125 mm overall width. Will these fit over my glasses?

if i buy 4 in 1 or 3 in 1 eagle eyes sunlenses can i give the base lens to my especial optcal doctor to modifiqued to mncesitys like my other lenses

if i buy 4 in 1 or 3 in 1 eagle eyes sunlenses can i give the base lens to my especial optcal doctor to modifiqued to mncesitys like my other lenses