Ok I see now. This is for people who normally wear a progressive lens that are using a single vision lens for a specific task(s) at a specific distance. Sorry, I spoke with my trusted eye doctor and asked him about a computer prescription for my correction. He said there was no such thing, but that's because I only wear single vision lenses - although I do a lot of computer work.
One last question, are the computer lenses primarily for presbyopia? Or do you guys using computer lenses also have hyperopia? Thanks for the clarification all- John On Sun, Mar 22, 2009 at 4:36 AM, Chuck Knight <[email protected]> wrote: > It's simple, John. Certain people need help focusing at certain distances. > > The traditional bifocal prescription involves different corrections for > distance (infinity) and reading (12" away) use. Guess what...unless you sit > unusually close to your screen, neither one of those is the right strength > for working on a computer! Or a typewriter, or even a desk, truth be known. > > So, they came out with the "computer prescription," which is the right > correction for an object (monitor) that's just about at arm's length. Works > well for people who work at desks, all day long... One other benefit is the > wide field of vision. No matter how good a pair of bifocals or > progressives, the relevant part is *tiny* compared to a pair of single > vision glasses. I don't yet wear bifocals, so I can only imagine what it's > like. I have a 24" monitor, and can't imagine peeking at it through > something as tiny as a bifocal. > > There's one other benefit to it, the way we buy glasses. Single vision > glasses are so cheap online, that we can have specialized pairs for > specialized tasks. If I had to pay $400 for a pair used only with my > computer, I would complain...an extra $8-13 doesn't hurt nearly so much. > > -- Chuck Knight > > > > On Sat, Mar 21, 2009 at 6:13 PM, John Szlachta <[email protected]> wrote: >> >> What's the story with computer lenses? Is this some kind of marketing >> ploy? Why would you wear single vision lenses in anything other than >> your full correction? Unless I'm missing that we're talking about >> progressive lenses here. >> >> iPhone >> >> On Mar 21, 2009, at 8:37 PM, Firewalker <[email protected]> >> wrote: >> >> > >> >> I just ordered 1 more pair tonight for computer use. >> >> >> >> My normal perscription is >> >> >> >> OD -3.50 -1.50 X 24 >> >> OS -4.50 - 1.50 X 165 add + 2.25 >> >> >> >> I ordered for computer >> >> >> >> OD -2.50 -1.50 X 24 >> >> OS -3.50 -1.50 X 165 >> >> >> >> Is that correct? >> > >> > If that ADD +2.25 is for both eyes, and not just for the left eye as >> > shown, then yes, that is correct. >> > >> > For the record, computer (or intermediate) glasses would have approx. >> > half of the ADD power added to the original SPHERE value. When it's an >> > odd number like +2.25, then you'd add either +1.00 or +1.25 to the >> > SPHERE value. >> > Just remember, if your original SPHERE is a negative (myopia), then >> > adding power to it would make the SPHERE go the opposite direction. >> > (-3.50 ADD +1.00 = -2.50). >> > >> > -=# Firewalker #=- >> > > >> >> >> > > --~--~---------~--~----~------------~-------~--~----~ Check us out at the oft-updated http://www.glassyeyes.com! You received this message because you are subscribed to the Google Groups "GlassyEyes" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/glassyeyes?hl=en -~----------~----~----~----~------~----~------~--~---
