When I eventually went to prescription/ progressives (multi focus not light dark) a few yrs back.. Had always worn light colour and weight shades, polarized for driving and boat fishing.
 Thought about the clip on.. but that extra weight on my nose did not sit well.
So went for the full prescription progressives plus polarized pair.
 Did mess around with the old glasses over the top.. sort of proof of concept if clips would be better.
That was a few yrs ago.. on 2nd sets glasses now and again got the 2 pair.
With stand prescription one is limited to the glass shading and colour...So if going for a particular colour/shade, go clip ons.
If not too flushed, more good fit, weight good all round drive/fish/etc.. go full glasses.

I also have that macra??? retina delamination and get injections.. which makes 1 eye pretty well blind.. look at a persons face thru that eye and they have just a roundish blur for a head..
With the prescription shades, one notices the blur using both eyes much more...to the extent that if unless had them on for quite a while (dont notice blur patch) it can be annoying.
Side note:
Have had to learn to shoot a rifle right handed...before did not know had the blur, and could not figure out why couldnt hit a barn wall for a few yrs... 1st shot with 7mm mag 250m hit the hanging 'teardrop' . about 3" x 2" .. and repeated several times with other rifles.

I've had prescription sunnies for quite a few years now. Really like them, they are not wrap arounds, but can't say I have had any problems with light getting in behind them.

Must say iv fished with several people that have had polarized, non wrap around style glasses, and iv handed them my pair to try for a few mins and they have been shocked at how much they are missing.   

Just bought myself a back up pair of fit overs:

Hey, 

Costa do the vast majority of their frames with prescription lenses. I put off getting a pair for a long time and regret that I did. 

Interesting discussion.