I hope Im doing this right,forgive me its my first post. I have never filled an Rx this extreme before. -20.50 -4.00 x175 -20.50 -4.75 x005 Her last lenses were hyper aspheric 1.66 double concave. Ive been told by my lab other options are Zeiss 1.70 and 1.67 blended myodisc. ( I am aware of the peripheral distortion associated with myodisc) Anyone want to share their opinion on the pros and cons of these options. I am reluctant to change her into something else.I would like to know as much as I can going into this.I am aware of frame restrictions. Thank you Huddie