As for spectacle lenses, are garage lenses better than commercial lenses?

Don’t the so-called ready-made lenses also come out of the garage? The store has the height and dispersion you want. It means that the store has a complete range of goods. As for the price, it depends on the quality of the lenses. For example: the refractive index told by the garage is 1.70 resin lens. (The price is more expensive) but the store said the refractive index is 1.56. (The price is lower)