Conditions of Free Glasses:
1. The frames must be the ones with "Free" tag on page: https://leoptique.com/discount/freeglasses
2. The lenses can only have SPH power, and between -200 to +200, no CYL power, no ADD, etc.
3. The refractive index of the lenses must be 1.50, with only anti-scratch treatment. Any upgrades will be chargeable.