Originally Posted by JohnnyLaw
They're the Seemax single vision. I had Essilor before. I have pretty severe myopia (-6/-8) and astigmatism. Same prescription. Same frame.
Depending on the amount of astigmatism this could happen. Basically, the thicker the lens becomes, the more distortion you'll see. Seemax does reduce distortion on the side but you'll always get the best vision through the middle of the front. Also another thing to consider is the base curve. The curvature of the lenses may be different as well as the index. All these are contributing factors. If you still don't feel comfortable, I would suggest to go change it back to the Essilor lenses. For whatever reason, it might just be a more suitable lens, although you will adapt to the new lenses. Usually people take up to 2 weeks to adapt, some even longer.