Interesting. Using one eye for one task, and the other eye for the
other task, might work.
I'm getting the impression that nobody offers glasses that change
focal length as you go side to side. Only ones that change as you go
up and down.
Is this for some optical or operational reason, or is it tradition?
Regards,
Rick
On Aug 9, 5:32 pm, Steve <[email protected]> wrote:
> Hi Rick,
>
> If you want glasses simply for helping other programmers, get a pair
> of single-vision glasses for the over-the-shoulder distance. Here are
> two ways to figure out what prescription you need. You'll need to know
> about how far it is from your eyes to the screens you can't read, and
> you'll need your "driving" prescription.
>
> Method 1. Use the following guideline: If the screens you have to read
> are 3 feet away, add +1.00 diopter to your driving glasses
> prescription's spherical correction. If the screens are 2 feet away,
> add +1.50 diopters. If they are 1.5 feet away, add +2.00 diopters.
> Most likely they are no closer than that, given that your computer
> glasses aren't working for this.
>
> Method 2. Put on your driving glasses and visit the reading glasses
> section of your local drug store. With luck, they will have glasses in
> every strength from +1.25 to +2.50 (in increments of 0.25). Try on
> various strength reading glasses *over* your driving glasses until you
> can read at the over-the-shoulder distance. Whatever works is what you
> need to add to the spherical correction of your driving glasses.
>
> IMPORTANT: Be sure you're adding a positive number to your driving
> prescription, not a negative number. You're a programmer, so I'm sure
> you know that when you add +1.00 to the number -2.25, you get -1.25,
> *not* -3.25!
>
> If you want a single pair of glasses that will allow you to help
> others, but also to see your own screen, for days when you're back and
> forth a lot, I suggest getting a pair of "monovision" glasses, with
> one lens optimized for over-the-shoulder and one lens optimized for
> your own screen. In other words, add +1.5 (or whatever you got above)
> to the spherical correction of your driving prescription for one eye
> only. Choose the eye based on which eye has the best view of the
> screen when you're doing the over-the-shoulder thing.
>
> For the record, I teach Computer Science and have to do a lot of over-
> the-shoulder myself, but I also have to see students from the front of
> the classroom. So my monovision glasses have one lens of "driving"
> prescription and one lens of "over-the-shoulder" prescription. My
> guess is that you want one over-the-shoulder lens and one "your own
> computer" lens.
>
> If your two prescriptions have slightly different PD values, don't
> worry about it. Either will work - my pick would be the larger of the
> two (probably the driving prescription).
>
> Feel free to ask more questions, or to post your prescriptions.
>
> Steve
>
> On Aug 9, 10:00 am, Rick <[email protected]> wrote:
>
>
>
> > Hi. I work as a computer programmer. For years, I've used one pair
> > of glasses for seeing my screen, and another pair of glasses for
> > driving. (Reading doesn't require glasses, at this point.)
>
> > Now I've changed jobs. I have a need to look over someone's shoulder
> > and read their screen. Neither focal length can do this. Apparently
> > it's within human capability, because my colleagues all do this.
>
> > As a number of my fellow programmers have discovered, regular bifocals
> > don't cut it. Our area of short focal length is NOT below. Our area
> > of long focal length is NOT above.
>
> > Is there an eyeglasses arrangement that will solve my problem?
>
> > Perhaps lens that change focal length as you scan left to right?
>
> > Regards,
>
> > Rick- Hide quoted text -
>
> - Show quoted text -
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