A lot of people don't know this but 20/20 vision is NOT perfect. Some people have even better vision, example 20/15 and even 20/10. Better than 20/20 was especially a great asset before radar was on aircraft, when fighter pilots depended solely on their eyes. Also when looking for a person in the water who was shot down or had to abandon.
"Is it normal that i can see further the a normal person"
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A lot of people don't know this but 20/20 vision is NOT perfect. Some people have even better vision, example 20/15 and even 20/10. Better than 20/20 was especially a great asset before radar was on aircraft, when fighter pilots depended solely on their eyes. Also when looking for a person in the water who was shot down or had to abandon.