How were the eyesight requirements for the Service Academies established? Which is to say, how did "20/XX correctible to 20/20 without more than YY astigmatism...", etc. become the standard? I'd be very curious to see how they came up with the standards in relation to the needs of the Services, and how the waivers were developed and set where they were. If we can expand it beyond eyesight (the one item that affected me), then by all means, feel free. Let's see if we can get a better handle on where these requirements come from, and WHY they are what they are. Thanks!