I understand that some brands have a large inventory and they match that stock to your prescription instead of custom grinding. What brands grind Rx lenses to a specific prescription?
It's common for brands that have prescription lens programs to stock pucks that are then ground down to fit each unique prescription. Think of it like a sculptor chiseling away at a blocks of marble to create different art pieces. The original dimensions of the medium are the same, but the end product is very different depending on the needs of the customer. Especially with digital lens surfacing technology, starting with a universally usable puck helps reduce turnaround time for you and give you the best edge-to-edge clarity that outperforms traditional grinding techniques. With how many dimensions are required to make a single pair of prescription lenses, it doesn't make sense for any brand to prefabricate prescription lenses because the complexity and variety is astounding.
Now if we're talking about readers (those over-the-counter glasses with a little magnification at the bottom) there are brands that do stock large inventories of those lenses for their frames.
It's common for brands that have prescription lens programs to stock pucks that are then ground down to fit each unique prescription. Think of it like a sculptor chiseling away at a blocks of marble to create different art pieces.
The original dimensions of the medium are the same, but the end product is very different depending on the needs of the customer. Especially with digital lens surfacing technology, starting with a universally usable puck helps reduce turnaround time for you and give you the best edge-to-edge clarity that outperforms traditional grinding techniques. With how many dimensions are required to make a single pair of prescription lenses, it doesn't make sense for any brand to prefabricate prescription lenses because the complexity and variety is astounding.
Now if we're talking about readers (those over-the-counter glasses with a little magnification at the bottom) there are brands that do stock large inventories of those lenses for their frames.
Hope that helps!