Semi-finished 1.67 UC/HC/HMC Single Vision Lens

This number indicates a high-index lens material. Higher index lenses are thinner and lighter than standard lenses (which usually have an index of 1.56 /1.61 ). A 1.67 index lens is often used for people with stronger prescriptions to reduce the bulkiness and weight of glasses.

These lenses are pre-made in a general shape and size but are not yet customized with the specific prescription, cut to fit a frame, or finished with coatings. Once you provide your prescription, they can be further customized to the exact prescription, pupil distance, and frame shape. This allows for a more personalized fit.