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In the modern society, the percentage of people wearing contact lenses has been increasing to improve their self-images. In the world, the percentage of people wearing contact lenses is 68%, and the trend of wearing contact lenses is gradually growing. However, 60% of people who first wear contact lenses misuse them. One of the mistakes that people who first wear contact lenses make is that they wear contact lenses without distinguishing the front and back sides of contact lenses. Direction finder helps people to distinguish the front and back sides of contact lenses with naked eyes through different refraction rates.
Dae-jeon, South Korea