I have a 71 year old lady, status PCE that is having some trouble with her new lenses. She states her vision is great, nice and crisp at every focal point as long as she is stationary. Once she gets up and moves around she notes getting dizzy. She has worn PALS for years with no complaints and has a very easy-going personality. She states it doesn't get any better with wear.

Most recent glasses prior to CE were:
-4.50 -0.25 x 30 PD30 +2.50 ADD
-6.00 sph PD30 +2.50 ADD
Hoya Summit ECP 1.7 (2BC), Seg 19
49/19 Silhouette Rimless

PCE glasses:
-2.00 sph PD30 +2.75 ADD
-2.25 sph PD30 +2.75 ADD
TruClear Digital, Trivex (3.48 BC), Seg 18
50/17 Silhouette Rimless

My question is could the lens material or BC be what's causing this? She has worn several different lens designs in the past and alternated between 1.67 and 1.7 with no issues or remakes. Doc did an RX reck today and even checked the fit and adjustment of the glasses. He also noted she moved through all focal points with ease and clarity. Doc thinks it may be the Trivex, I'm leaning more towards the BC but want to make sure I'm not missing something.

TIA