Comments on: Prism lenses

By: Nordlys

Nordlys — Sun, 12 Apr 2015 21:31:20 +0000

Luckily my vision stapped to go worse at 20, therefore I’m just having -3 dyopters in the left eye and -4 in the right eye, plus a -0,25 and +0,25 of astigmatism, both in my right eye (but it bothers me a lot, at the point that I perceived it like if I’m having 2 dipopters. 0,25 is right, because with my glasses, I see clear). I might have astigmatism in my left eye too.
Recently, my optician didn’t visited me accurately, and he gave me lenses with just -2 and -2,75 diopters, and left astigmatism uncorrected. I wore my new lenses two days, but blurriness (from myopia) really bothers me. So I went back to my old prescription (luckily last time I bought two pair of glasses).
I have myopia since I was 12, astigmatism since I was 21

By: Ann P.

Ann P. — Mon, 10 May 2010 02:37:43 +0000

I have astigmatism since mid-childhood.
About two or three years ago, I got new glasses, and chose a new type of lens that was flatter in front than anything I’d ever had before.
Wow. I had known I had a problem with seeing object moving directly towards me, or calculating how fast said objects were moving. Only after I got the new lenses did I realize why: I had only partial depth perception.
I can see fully in depth now, but my brain still has trouble processing, since I went for so long without that part of the visual field.
The only amusing side effect of that visual limit is my brain learned to calculate 3D from an otherwise flat image. If a tv is sharp enough, I see in 3D whether a program is in that format or not! =)

By: Jesse the K

Jesse the K — Tue, 27 Apr 2010 23:12:37 +0000

Oh! Prism glasses! I’m fortunate to have double vision both sideways and vertically, and it’s different near and far. The first couple eye doctors didn’t believe it!

It always takes me a wearying 14 to 20 days to become accustomed to a new prescription.

And then, sadly, after a year or so my vision changes again and I need the prism changed.

My latest eye doc did teach me something fascinating. There’s a psychological “comfort zone” for vision: anything that’s closer than that makes one feel uneasy, and then closer still can make one feel threatened. The eye doc claims that many people DXed with “reading disabilities” actually are dealing with this “too close for comfort” issue. If a person’s natural focus point is “too close,” then why would they want to read? She claims that one can oh-so-slowly bring the comfort zone boundary closer to one’s natural focus.

By: Pueblo Girl

Pueblo Girl — Sun, 25 Apr 2010 00:26:23 +0000

I just got some new glasses. I love them – the world is clearer, but…at the same time, distances and perspectives seem strange. It’s taking my body a while to adjust – today I just crashed into a rock and messed my knee up bad.
Take care, take it easy until you get used to them.

By: j

Sat, 24 Apr 2010 23:38:02 +0000

I’m reminded by your post of the way that movies portray people who suddenly gain sight–as though they just wake up one day after being blind all their lives and dance instead of being absolutely terrified.

There was the one Val Kilmer movie (At First Sight) which dealt at least slightly realistically with how all of the visual information would seem confusing and nonsensical at first, and how it would be a lot of time and work to make sense of it and learn to understand the meaning. (It also mentioned the complication in employment terms caused by going from being unable to read print because he couldn’t see it, to being unable to read print because he didn’t know how).

By: Spaz Girl

Spaz Girl — Sat, 24 Apr 2010 18:11:28 +0000

I have no depth perception either as a result as CP related strabismus and whatnot. I’ve had the muscles surgically corrected twice but the loss of depth perception is permanent. I’m constantly walking into puddles because I can’t distinguish them from the ground. It would be interesting to suddenly gain depth perception like that…sounds freaky.

By: mom

mom — Sat, 24 Apr 2010 16:07:01 +0000

I am thinking your body needs to react to the world as you now see it for a period of time and make adjustments. It is like a baby learning that when you reach for something you actually connect with it. It takes some experimenting before it feels right. A good deal of a babies first work in crawling about is integrating sight with body sensations and it takes time. Once your body interacts with the spatial feeling of the image of things sticking out all over the place where they didn’t used to that will begin to feel more natural. It is not something most of us have to do as adults so it must feel odd for sure.

By: ballastexistenz

ballastexistenz — Sat, 24 Apr 2010 04:32:09 +0000

I don’t fully understand the science of this, but these sort of prisms don’t make rainbows, they just move the images over somehow. So that instead of being two separate places I am seeing, it’s just one. You can have different degrees of prism in different directions to deal with eyes that are pointed in various directions when they shouldn’t be.

Today I do feel better than yesterday but the stuff popping out effect is new and strange. I don’t dare go out far until I’m more used to it than this.

By: AnneC

AnneC — Sat, 24 Apr 2010 01:55:54 +0000

I’ve never tried prisms unless you count those thin plastic cardboard-framed things that make everything look rainbowy (I got some in the gift shop of a science museum, or something, as a teenager). But I did have a weird experience with depth perception and glasses as a kid. They actually gave me bifocals for a while because I read a lot and they (eye doctors) were worried about my distance prescription causing eye-strain for close range stuff. Eventually they decided to give me regular (non-bifocal) lenses again, though (maybe a year or two later) and after that things were VERY weird for a while. I very nearly jumped out of a tree from a rather dangerous height because the ground looked much closer than it was.

By: Riel and Julian^Amorpha

Riel and Julian^Amorpha — Fri, 23 Apr 2010 22:25:48 +0000

Also, our last comment seems to have gotten stuck in the spam filter.