Metal Halide Lamp can be the most flexible and effective solution for surgeons, dentists, and dental Metal Halide Lamp. Clip-on style loupes can be attached to virtually any frame of glasses. This flexbility makes this style of loupe very popular among users who may already have glasses, and are especially popular with people who wear prescription lenses. Many users who wear prescription glasses are pleased that these loupes can be applied to their existing frame and therefore they do not have to have a pair of loupes custom made for them.