Icebreak
Flashlight Enthusiast
I've been trying to figure out how to word this for over a year. I'm hoping this thread takes a bit of a scientific discussion in slant.
I'll go ahead and get the disclaimer/warning out of the way. Be careful with UV and NUV lights.
When I hit the magical 40 yr. old mark my vision went south in a hurry. Not terrible, I just can't read very well without glasses or contacts. I have astigmatism. Distance is kind of blurry for highway signs. Close up for reading is worse.
Well, I was shining a 5W RB across the room at a black and white towel. It appeared to be fuzzy and out of focus. Instinctively, I reached up to see if I had my glasses on. They were. I shined another white 3W at the towel and it appeared to be in focus. I took my glasses off and, as expected, it was out of focus. Then with my glasses still off, I shined the Royal Blue at the towel and is was very much in focus. Huh? Then I shined the Royal Blue at a book shelf and I could read the titles on all the books. It's really an astonishing effect.
Let's take this outside. At night of course, with my glasses on and shining the Royal Blue at foliage, everthing looks way out of focus. Take the glasses off and everything is in focus.
A couple of years back, a rather colorful member (MutineySpears) told us that he was a stage performer and was legally blind. He said he was wearing an antenna he built. On the left antennea was a Red/Orange emitter. On the other antennea was a Royal Blue emitter. He explained that this set up helped his ability to see and navigate significantly. We had a pretty good discussion about it but it wasn't until I saw it for myself that I truly understood what he was talking about.
I was reading a recent thread by Cobb who is legally blind. He notices improved reading ability using white LEDs which are bluer than incandescant lights. If I'm looking through the top of the lenses of my no line glasses (this area is for distance) predictably I can't read fine print text very well. I picked up a seven 5mm blue led light and shined it at the fine print text and it came into focus.
Could it be that many of us that prefer LEDs for detailed work are enjoying some vision correction?
That's not really my question. I'm convinced that higher frequency light improves my vision because I've seen it right before my eyes.
My question is...why?
I have some theories but I would like to know what you guys think.
------------------
- Jeff
***EDITED*** to say higher frequency. Thanks, Jan.
I'll go ahead and get the disclaimer/warning out of the way. Be careful with UV and NUV lights.
When I hit the magical 40 yr. old mark my vision went south in a hurry. Not terrible, I just can't read very well without glasses or contacts. I have astigmatism. Distance is kind of blurry for highway signs. Close up for reading is worse.
Well, I was shining a 5W RB across the room at a black and white towel. It appeared to be fuzzy and out of focus. Instinctively, I reached up to see if I had my glasses on. They were. I shined another white 3W at the towel and it appeared to be in focus. I took my glasses off and, as expected, it was out of focus. Then with my glasses still off, I shined the Royal Blue at the towel and is was very much in focus. Huh? Then I shined the Royal Blue at a book shelf and I could read the titles on all the books. It's really an astonishing effect.
Let's take this outside. At night of course, with my glasses on and shining the Royal Blue at foliage, everthing looks way out of focus. Take the glasses off and everything is in focus.
A couple of years back, a rather colorful member (MutineySpears) told us that he was a stage performer and was legally blind. He said he was wearing an antenna he built. On the left antennea was a Red/Orange emitter. On the other antennea was a Royal Blue emitter. He explained that this set up helped his ability to see and navigate significantly. We had a pretty good discussion about it but it wasn't until I saw it for myself that I truly understood what he was talking about.
I was reading a recent thread by Cobb who is legally blind. He notices improved reading ability using white LEDs which are bluer than incandescant lights. If I'm looking through the top of the lenses of my no line glasses (this area is for distance) predictably I can't read fine print text very well. I picked up a seven 5mm blue led light and shined it at the fine print text and it came into focus.
Could it be that many of us that prefer LEDs for detailed work are enjoying some vision correction?
That's not really my question. I'm convinced that higher frequency light improves my vision because I've seen it right before my eyes.
My question is...why?
I have some theories but I would like to know what you guys think.
------------------
- Jeff
***EDITED*** to say higher frequency. Thanks, Jan.