I haven't tried "Lunettes pour tous" yet but I usually go to "Générale d'Optique" [1] where the basic glasses cost 25€.
Your advice has less shops in France but it seems very interesting and I'll definitely buy from them in the future if I have to. Générale d'Optique has a very restricted choice of frames which is why your link seems better.
Your advice has less shops in France but it seems very interesting and I'll definitely buy from them in the future if I have to. Générale d'Optique has a very restricted choice of frames which is why your link seems better.
[1]: https://www.generale-optique.com/