If you want a slightly weaker prescription, change just the first numbers for each eye. Don't change the other numbers. For example, your "let's say" of
right: -450 -125 95 left: -350 -75 75 corrects all but 1/2 diopter of spherical correction. It should give you perfect vision for distances up to 2 meters, and a bit of blur beyond that. You might pass a driver's test with them, but I wouldn't advise driving with them. I definitely wouldn't suggest them for movies or spectator sports, but they could be an excellent choice in many indoor settings (home, work, shopping). These will also let you focus a bit closer than you can with the full prescription, but there's a pretty narrow age range where the advantage of 1/2 diopter on close vision is likely to make a difference. If you're young enough, you can focus close with the full prescription, and by the time you're 45 or 50, you need reading glasses or bifocals - 1/2 diopter isn't likely to help too much in typical situations. The second and third numbers for each eye are corrections for astigmatism. If you don't fully correct the astigmatism, you won't see perfectly at any distance. You need the full astigmatism correction to counteract the asymmetry in your eyes. Without the full correction, straight lines in some directions will be blurry and straight lines in other directions will be crisp. The astigmatism correction works at any distance and with or without correction for your nearsightedness. Steve On Nov 26, 5:08 pm, Nick <[email protected]> wrote: > My rx as the dr gave it to me: > right: -500 -125 95 > left: -400 -75 75 > > I don't want to get the full strength rx, but I don't want pc lenses > either,I want lets say -450 and -350. If I do that, will the other > number have to changed also in tandem, or are they independent to the > first number? -- Check us out at the oft-updated http://glassyeyes.blogspot.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
