Subject: Does anyone actually put up a Snellen and read it. Here are the reasons I doubt that they do it.
After I had my cataract surgery (I would have been happy with 20/40 vision, with no glasses), I down-loaded this Snellen.
I figured I could “recover” from 20/40 (self-measured –1 diopter) if I had to. I have no fear about doing that effort.
After I put up the Snellen, and started reading it – I realized that I HAD NO IDEA WHICH LINE I WAS READING. I had to walk towards the chart – to see which line.
That was OK, except that I wanted to check on a regular basis. That is why I had to write in big letters, 20, 25, 30, 40, 50, 60 and 70.
The fact that no one complained about this problem – leads me to believe that no one checks (or is not very serious).
http://endmyopia.org/the-ciliary-pop-a-simple-trick-for-healthy-eyes/ In fact I see “variation”. That means SOMETIMES, I read the 20/25 line. But I would say 90 percent of the time, I read the 20/20 to 20/15 line.
In fact, I do not eve bother with a 20/15 line. The 20/20 letters are very sharp – so I can step back to 30 feet and continue to read them.
In fact this is why I use low-cost test lenses. That is to measure “positive status”, i.e., see if I can read the 20/20 line THROUGH a +1/2 diopter lens.
For me that is the real, “final result” – that I can do that.
For me, I consider difficulty reading the 20/40 line, to be the real problem. If you have your own –1 diopter, you can just check to see
if you can read the 20/20 line though it. (The intention is NOT prescription.)
It is to show that you have NO MEDICAL PROBLEM. I think anyone serious – should know and check that way.
This is why I call it a “negative state”, not a failure.
At that point, I would start full time plus wear for all close work – and keep doing it.
When you make measurements yourself – you tend to believe your own measurements.
If you do not do it – you are wasting your own time.
I like ODs. But they do not believe that I have the capability of doing this myself. That is the line that divides science – from everything else.
Best,
Otis