Ask a simple question — what is the strongest prescription this frame accepts? — and most product pages have no answer.
Waveguides constrain lens curvature. Inserts constrain thickness. Wrap-around sports frames constrain both. Each of these has a real numeric limit that manufacturers know and rarely state.
Lenscript records prescription support conservatively, and marks it unknown rather than guessing. Final compatibility should always be confirmed by a qualified optician.