A groundbreaking visual acuity test chart for men who seems to devour himself unintentionally

When we say sight test,A method of identifying the open direction of a C-shaped ring (Landolt's ring) of different sizesAlthough it is major, this seems to be a more breakthrough eyesight table.

However, it seems that only male guests are effective.

Details are as follows.
This is a revolutionary visual acuity test chart. I will make it into my mind to devote myself unintentionally.


This is a more provocative version.


For the original image, see the link below.

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If you have such an eyesight test chart, your eyesight test may be fun too.