Photochromic lenses whether is workable for rimless frames?

[mens glasses]

i like rimless eyeglass due to my face is too wide. But, some websites told me that they can't supply 1.56 index lenses to process with the rimless frames, and photochromic lenses seems that it is only available with 1.56 index. Is it correct? Can you give me some advices? It is difficult for me to choose the perfect lenses that can fit me well.

[glasses lens]

Due to rimless frame needs stronger and more durable lenses such as PC lenses. BUt, the PC transition lenses are not available currently. If you are really interested in transition lenses, we recommend you choose any full rim or half rimless frames.