Bashny.Net
In the Soviet Union there was a table for testing of observation. Its name is "Entertaining the table."
Bashny.Net
Look on the table sequentially numbers from 1 to 90 inclusive.
If you can find these numbers:
For 5-10 minutes, you have an exceptional observation.
For 10-15 minutes - good.
15-20 minutes - the average.
20-25 min - satisfactory.
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See also
Overview of the new large telescopes
The anecdote about how the three inductee to the appointment with the eye doctor went
Prisoners of war in the USSR
World Test Pattern
Without trade with the West? Well, we lived
10 simple exercises to restore vision
A separate power supply. Product compatibility table
