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Help you to distinguish which is the correct side.
Traditional contact lenses are hard to distinguish correct side.
To protect eyes from the discomfort feeling which cause by the incorrect side.
The light reflects in incorrect side and shows as a mirror. And light goes through in correct side just look like normal contact lenses.
The Mirror Contact Lenses use the same technology as a one-way mirror. It's a reflective optical coating (called a mirror coating or flash coating) on the middle of the lenses to make them appear like small mirrors . This technology is also used in sunglass.
National Taipei University
Chen, Huang Yu
Huang Yu, Chen Shih Ting, Huang