Progressive eyeglasses?

[Pico and ME]

I have progressives and some the negatives stated apply, but it is even worse for me because I have really bad nearsightedness and astigmatism. I fantasize about getting that eye operation just so my bifocals wont be such a pain in the ass. I had to have them re-do the lenses on my last pair three times and they still are a little off. Glinda is right tho....for every day use they cant be beat. As long as all the other variables are correctly taken care of...correct prescription and correct placement of the optical center, then I do love my glasses.

[Cloud]

Yes, I have them and wear them for years. Wouldn't be able to function without them really. They're hella expensive, and unfortunately my prescription is tricky, so the online option doesn't really work for me.

[Spexxvet]

Originally Posted by Pico and ME

... I fantasize about getting that eye operation just so my bifocals wont be such a pain in the ass...

Unless you get one eye corrected for distance vision and the other eye corrected for near vision, surgery won't have much, if any, impact on your multifocals. Really tough Rxs benefit from newer, "digital" or "free form" technology, but the lenses are pricey.

Originally Posted by Cloud

... They're hella expensive,
....

They're like any product - you can get the Yugo of progressives or the Maseratti. Which of these would you like to look through?

[Undertoad]

Spexx, can I ax you related questions? I became nearsighted at age 21, four months into working full-time at a monitor. My doc suggested I take the glasses off to work closeup, and so for 24 years I've religiously taken off my glasses to do computer and other close-up work.

A) Does that help delay in nearsightedness worsening?
B) Is presbyopia inevitable? I'm 45 and I still feel good about seeing everything near without a lens... although I think I have moved the monitor 3" closer in the last two years... tell me my future sir.

[Spexxvet]

Originally Posted by Undertoad

A) Does that help delay in nearsightedness worsening?

Some doctors believe that it does. There is a theory that if you wear your glasses (which correct for distance vision) to look at things up close, that you "strain". Straining is just using your eye muscles to overcome a visual deficiency. Using your eye muscles can raise the temperature in your eye, the heat tends to break down eyeball tissue, and your eye can become elongated, which increases your nearsightedness.

Originally Posted by Undertoad

B) Is presbyopia inevitable? I'm 45 and I still feel good about seeing everything near without a lens....

Yes, it's inevitable, and you're probably already on your way. For now you can see up close without your glasses because you're nearsighted. The test is to read something like the telephone book at about 18 inches with your glasses on.

You can't count on being able to read comfortably without glasses forever. Nearsighted corrections are always a minus value. A presbyopic correction is always a plus value "added" to the distance power. My guess is that your current distance Rx is about -1.00, and your (unused) presbyopic "add" is about +1.00, making your net near vision power zero. That's why you can see close without correction. Eventually, your "add" power will increase, typically topping out at +2.50 when you reach 60-ish. At that point your net near vision power might well be +1.50 (-1.00 +2.50 = +1.50) (assuming no change in your distance Rx). Then you'll have to decide if you want two pairs of glasses (or more, because the power you'll need for "near" vision will not be the same as the power you'll need for "intermediate" vision. Intermedite is about 20" to 30" or computer distance) or multifocals.

Reading Adds
Finding the correct reading add is a difficult task. Most refraction errors come from improper add power. We will not attempt to discuss a great deal of theory here, but you should know that a patient can comfortably utilize - of their available amplitude of accommodation (the reciprocal of the near point). Amplitude diminishes with age. For example, researchers claim we have at age 10, between 11 and 14 diopters of accommodation amplitude, by age 40 it is between 4.5 and 5.5 (Borish, Vol. 1, 1970 pp. 169-170). It takes +2.50 D of accommodation to focus at 16 inches, normal reading distance. If we only have +5.00 available, it is easy to see why we may need bifocals at age 40. Unfortunately, all people are not the same. Some may need a +1.00 add at 40, while others may require a +1.25.

A fairly simple, but effective way to determine add power is to use the Eggers Chart for near. A rule of thumb that works well, states that at age 40 a +1.00 to +1.25 add will be required. For each 5 years after 40, and additional +.025 is required.

[Undertoad]

Fascinating stuff, thanks!

[Spexxvet]

My pleasure.

[xoxoxoBruce]

Originally Posted by Spexxvet

snip~ There is a theory that if you wear your glasses (which correct for distance vision) to look at things up close, that you "strain". ~snip

I thought wearing corrective lenses would prevent straining??

[Spexxvet]

Originally Posted by xoxoxoBruce

I thought wearing corrective lenses would prevent straining??

It does, as long as you're using the lenses for their intended use. When you try to see up close while wearing a distance correction, you'll strain.

[xoxoxoBruce]

Ah, got it. Thanks.

[Pie]

I became near-sighted about 3 years ago (early thirties). Cause: too much computer work.
So I have glasses for driving, walking around, etc, but have been advised to never wear them when computing, reading, or any close-work, or my eyes will become worse.

I would like to give a shout-out to my online glasses company -- EyeBuyDirect. I get frames, lenses, anti-scratch, anti-uv and anti-reflection coatings for less than $50, and delivery within a week, usually. With a case and microfiber cloth to boot.

[monster]

Please shoot me when when contact lenses can't cope with the needs of my aging eyes. That is all.

[SteveDallas]

Originally Posted by monster

Please shoot me . . .

With a paintball gun, right?

[Undertoad]

Interesting NYT article - this guy has invented lenses that are partly fluid, and so you can actually change the focus, by adjusting a lever on the bridge.

One down side is that the lenses have to be round. In the future we are all going to look like John Lennon.

[dar512]

Originally Posted by Undertoad

One down side is that the lenses have to be round. In the future we are all going to look like John Lennon.

Well he was ahead of his time.