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When your lens falls down from your hands, how do you find? Most people may have difficulty of finding, and it also takes a lot of time Because the lens is transparent. But What if the lens has black and white lines?
Because of these, you will find the lens that falls from your hands effectively.
These lines are easy to find. Black one in the brighter ground, and white one in the darker ground.
The lens usually fall on the floor when I use it.
Since the lens is transparent, I can’t find it.
Now the lens has black and white lines, so I can find it easily.
deagu, South Korea
won gi kim,
na eun kim,
ji young lee,