Zeiss is a lens brand, and the lenses produced in carl zeiss are called carl zeiss lenses. Ordinary lens is actually high definition in the literal sense, and there is no such word in the professional field. Different materials: carl zeiss lenses are basically BS- titanium, and ordinary lenses only use ordinary glass lenses.
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At present, there is no difference in quality between domestic lenses and Zeiss lenses, and the difference is mainly the brand effect. After all, Zeiss is an international brand, and its brand influence is incomparable to domestic brands for the time being.
Progressive lens is a kind of multifocal lens, which is different from traditional reading glasses and bifocal reading glasses. Progressive lenses do not use bifocal lenses when the eyeball must constantly adjust the focal length, and there is no obvious dividing line between the two focal lengths.