Interpreting Snellen - Printable Version +- Eyesight Improvement Forum (https://www.iblindness.org/forum) +-- Forum: General Discussion (https://www.iblindness.org/forum/forumdisplay.php?fid=4) +--- Forum: Bates Method (https://www.iblindness.org/forum/forumdisplay.php?fid=5) +--- Thread: Interpreting Snellen (/showthread.php?tid=2097) |
Interpreting Snellen - Shambles - 05-27-2012 I have started to use Snellen charts, I have a few questions. I can read the 20/60 line but its not clear... I mean I can read the big E 20/200 even then its not crystal clear. Only time I can actually see them 'clearly', like fine precise edges is when I get a very good flash. I guess my question is, if you can guess/interpret a letter does that mean you can read it/passed that line. Re: Interpreting Snellen - clarknight - 05-27-2012 http://www.youtube.com/watch?v=863yFmc-Ius http://www.youtube.com/watch?v=mYpsYPPV_hg Re: Interpreting Snellen - FIAT2LUX - 05-27-2012 The farthest line that you can interpret the letters for half of that line is what your Sbellen acuity is. When I got prescribed my glasses, I could read the 20/15 line. I didn't see it crystalline clearly though, and rarely can someone see that much perfectly clear (btw, that's the -4 lenses that I don't use). So let's say you can read the big E on the chart and it's 20/200. You can read all the way down to the 20/70 line and can sort of guess based on what you see, half the letters on the 20/60 line, but no more. That means you have 20/60 acuity. That's how the eye doctors use it. Re: Interpreting Snellen - Nini - 05-28-2012 When I look at the eye-chart, I can see my 'state of relaxation' and 'central fixation': When I am not relaxed, even all the big letters are blurry, although I can read part of them. When I am very relaxed, then I see - automatically - in the right way and the letters appear completely clear and black against the white background till the 20/50 line including; the 20/40 line is readable, but not as clear and parts of the next 2 lines below I can also make out. When I practice central fixation being (initially) relaxed or not, it is even a bit better and sometimes the beginning and the end of the 20/20 line becomes clear. Re: Interpreting Snellen - Shambles - 05-28-2012 FIAT2LUX Wrote:The farthest line that you can interpret the letters for half of that line is what your Sbellen acuity is. When I got prescribed my glasses, I could read the 20/15 line. I didn't see it crystalline clearly though, and rarely can someone see that much perfectly clear (btw, that's the -4 lenses that I don't use). So let's say you can read the big E on the chart and it's 20/200. You can read all the way down to the 20/70 line and can sort of guess based on what you see, half the letters on the 20/60 line, but no more. That means you have 20/60 acuity. That's how the eye doctors use it. Thanks. You can read the 20/15 line that sounds like some vision improvement! It could also have been some over prescription. I guess I should thank my eye doc , I dont think he ever really over prescribed me. Re: Interpreting Snellen - FIAT2LUX - 05-29-2012 Shambles, That was totally overprescription. I've had improvement and a few 20/20 flashes, but I am not that far on my own eyes. Also, I guess that would be pretty nice that your eye doc doesn't overprescribe. Yay for that! |