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I have regular bifocals. The ones with the line. I tried progressives once. For about two hours and it was either go back to my previous set or go insane. The distortions off to the side we the tiniest bit aggravating while driving. As in "what the elephant was that over there?"
So, regular bifocals with rest of the world on the main part of the lens and reading distance in the bifocal area.
Then, I have a second set with the same bifocal area, but, the main vision is set for monitor distance, not outside distance.
There are also the sunglasses and prescription safety glasses for work, but, that's just over the top.
My "computer" glasses has a narrow short-distance field at the bottom, a wide middle-distance field in the middle and a narrow far-distance are at the top. My so-called "reading" glasses have wide short-distance and a wide far-distance fields, separated by a narrow middle-distance field.
I was expected/expecting to use the "reading" glasses as default, switching to computer glasses only when sitting in front of the PC. It didn't turn out that way: I use the computer glasses all the time, with one exception: Evenings/nights when light is low, when driving the car, constantly having to bow my neck to get those traffic signs into the top area of my field of vision, really strains my neck. (In full daylight, I can can easily read them through the middle field.) So I have got my "reading" glasses parked in my car for far distance reading of traffic signs in (semi-)darkness.
I am near-sighted. When I (finally!) got glasses around age ten, I was surprised to learn that all those star constellations such as the Big Dipper or Orion were more than mythology - you can actually see those stars making up the figures!
I first got glasses (I'm short-sighted) around that age; stepping out of the opticians into the street was an astonishing experience - one I've never forgotten. I had no idea that's what the world was supposed to look like. Literally, a revelation.
I got my first glasses at about the same age. After that, I could actually read the blackboard clearly but I got teased mercilessly as "four-eyes" and such. That didn't last long as many of my classmates started wearing glasses over the next year or two.
My wife, on the other hand, started with glasses at the ripe old age of twenty-four. She is far-sighted and needed them for reading. Without them, she was having headaches from eye strain. On a daily basis, she does not do much close work — the closest she needs to see most of the time are the gauges and warnings on her dashboard. She and my children drive eighteen-wheelers for a living.
The issue I am having - doc says, "wear them for two weeks all the time, then let me know..."
I have a 25" display to my left, and with the glasses, it is all blurry. Same level as laptop screen. Laptop is much better - directly in front of me. Reasonably clear. I think I need the computer version of the progressives.
<italic>Stuck in a dysfunctional matrix from which I must escape...
"Where liberty dwells, there is my country." B. Franklin, 1783
“They who can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.” BF, 1759
I've done progressives for years. The computer-generated version were not worth the extra money. There are things you need to get used to (actually, your vision will automatically accommodate some in a short time).
The optimum visual field (for you prescription) is a vertical region in the center of each lens. More expensive lenses tend to have a wider vertical region. You'll tend to turn your head more to see clearly because of this.
When first wearing them, looking down may give you the perception of a curved floor/sidewalk. This is one of the things you will accommodate.
Mine are prescribed for computer use: the central field is focused optimally at about 3 feet (1 meter) and the infinite distance is a bit higher on the lens. You may not have done this.
You'll not have as good a prescription as single-vision - you are making compromises.
If they didn't tell you why, the reason you've gone to bifocals is that your lens is less flexible and won't deform for the close focus as well as it used to.
The only option to getting old is worse than bifocals . . .
I wear progressives all day EXCEPT when writing code on my desktop. Two large monitors don't fit nicely through the narrow slit of the near field offered by progressives. I have a pair of cheap readers dedicated to desktop work.
Two things to consider:
- Normally focal distance for near field is calculated based on standard reading distance (~30cm). Screens are more like 60-70cm away. You can ask your optician to figure out what your specific need based on your distance between eye and screen(s).
- Field of view area of the near field for progressives is about 30% of the lens area (or less). You have to move your neck a lot to see the whole screen, specially in dual monitors configurations.
Wore regular bifocals for years. One time, I tried progressives and gave up. Had to turn my head too much. I guess the tracks are wider now.
5 years ago, I had cataract surgery, left eye set for close, right eye for distance. I very rarely wear glasses. I do have a pair I wear for driving, corrects my left eye for distance. I have a pair of readers that corrects the right eye, only wear them if I am going to do a lot of reading. Works great.
One time, way back, Optometrist wanted to sell me contacts like that, told her she was nuts. Should have listened.
If you can keep your head while those about you are losing theirs, perhaps you don't understand the situation.
I had them for many years and still have a scratched pair for backup, but I always have a dedicated pair of single lenses for computer work, we spend so many hours sitting in front of the dammed things it is worth it.
I recently started getting the $15 fixed lenses from the chemist/drug store (for the yanks) for reading as I find I no longer need glasses except for reading and computer work. Instead of spending $500+ on progressive glasses I spend $60 on 4 pairs and leave them where I need them.
Never underestimate the power of human stupidity -
I'm old. I know stuff - JSOP