If you want to keep it simple and cheap, get the spec savers polarised lenses. For general fishing they are fine, indeed the last pair I got last year were a marked improvement over previous lenses for fish spoting. Their yellow lenses also make great dusk glasses.
If you need that extra 5% performance you’ll need the big brands. Serengeti’s take some beating but cost a lot. I have loads of Oakley so wear with contact but they scratch easily.
I’ve not tried polarised from any of the online opticians, but I’m sure I will soon.
I have been doing a trial of the Varifocal contact lenses but they are blurred at distance. So a bit disappointed in them. Have my second appointment next weekend so hoping to get a better prescription for the lenses.
I also got a pair of Optilabs - the HLT ones - came in very handy for seeing the fly in poor light last week. Made a huge difference.
I have a varifocal prescription, which they made up for me, but I didn't have the measurement from pupil to pupil, so I measured it myself, and I don't think I got it quite right. I wouldn't sit and work at the computer screen with them... but they are fine for fishing. Anyway, when buying online, try to ensure you have all the details, including the pupil to pupil measurement.