
OPTIVISION ONLY USES THE BEST QUALITY LENSES
In todays technology lenses can be be made in many forms:
SINGLE VISION - For either distance or reading only.
BIFOCAL - Both distance and reading with one pair of glasses but has a distinct line visible on the lens.
VARIFOCAL - Allows clear vision at any distance from near to far without any visible lines on the lens.
HI-INDEX - Lenses that are thinner than normal index materials.
PHOTOCHROMIC - Lenses that react to the the sun (UV Light), making them go dark in the sun and nearly clear indoors.
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