OK, I had both mine done 12/13 years ago.
First off, I was very young for cataract surgery - it was caused by excessively high blood pressure, my lowest systolic reading was 240. I only went to the doctors (I hadn't been for 30+ years) because my eyesight was deteriorating rapidly, I'd have my eyes tested, order new glasses, and by the time they came I needed new glasses again.
Now I was
VERY short sighted, without my glasses I could read a book without my glasses only an inch or so away, it was quite good for fine electronics work. I'd been wearing glasses since I was eight years old, when they came round school doing eye tests - as you've never known any different, you don't realise you can't see properly.
In the UK we have the NHS, which is totally free - but you only get a choice of plain distant, or plain near, lenses - although you could presumably have one of each if you wished, but I suspect that could be quite confusing?. If you want anything else, you have to go privately and pay for it - but apparently the plain lenses have a higher success rate anyway.
So given the choice, I choose distance vision - and while not perfect, I can confidentially drive without my glasses (but never do), previously I wouldn't have dreamed of attempting it, if I could even find the car
Astigmatism has been mentioned, but a common side effect of cataract surgery is causing astigmatism, and I had it anyway. I believe the guy who did my second eye (the left one) fitted the lens at an angle, to try and reduce the astigmatism.
So I now wear multiple pairs of glasses:
1) An expensive pair of varifocal ones, which I wear full time - without them I can't read prices in shops very well
As well as giving me close and mid-range vision, they also correct for astigmatism.
2) Reading glasses - cheap on-line prescription glasses - this gives you full width/height vision for reading or electronics work. I have two pairs, one at work on my workbench, for soldering etc. and one at home on the bedside table, for reading my kindle.
I also use "Doc Brown" magnifying headsets for exceptionally close work, over the reading glasses.
3) Computer glasses - cheap on-line prescription glasses, avoids you moving your head up and down all the time while on the computer
I have one pair next to my computer at work, and one pair (which I'm wearing at this moment) next to my computer at home.
The expensive ones were about £400, mostly for the top quality varifocal lenses, the others were only £10-15 on-line.
You mentioned +3.5 glasses for near vision, the implants in my eyes are both around +6.5
- they gave me little cards with all the details on, which I still have.
Just checked my prescription from back when I ordered the glasses, the reading glasses are +2.75 over the prescription, and the computer glasses are 1+.5 over the prescription.
I'd suggest the plain distance lens for the implants, wear varifocals for normal use, and separate cheap single vision for reading and computer use, as I do - I find the combination works really well.
How short sighted are you currently?, if you're seriously short sighted (as I was), it puts you at high risk of detached retinas, and again it's also a potential side effect of cataract surgery (and also of getting old). I've had both mine done, the left 12 odd years ago, six months after the implant was fitted, and the right one last August/September. It's something you should discuss with your optician and surgeon, assuming they haven't already talked to you about it..