This is enough for the basics, but modern lenses are more complex. Eg multifocals for basically anyone over 45, or high end custom lenses that can correct highe

This is enough for the basics, but modern lenses are more complex. Eg multifocals for basically anyone over 45, or high end custom lenses that can correct higher order aberrations. Anyway, the optometrist lenses kits are still there, you can order them from aliexpress.