> Is it practical to make eyewear (glasses) lenses from sapphire?
They would be way heavier than good polyc lenses, yet more expensive than basic (heavy) glass. I doubt there's much of a market, but might have more luck/info asking manufacturers directly (essilor, leitz, nikon, zeiss, ...)
They would be way heavier than good polyc lenses, yet more expensive than basic (heavy) glass. I doubt there's much of a market, but might have more luck/info asking manufacturers directly (essilor, leitz, nikon, zeiss, ...)