Mick F wrote:+1 for Optilabs.
Have a pair of varifocal "Drivewear" cyling glasses for many years.
The prescription is well out of date, and the frames are getting tired (like me!) so I went for an eye test at Specsavers a couple of years ago. I asked about varifocal cycle-specific wrap-round glasses and showed them my Optilabs pair. They couldn't do it.
Mrs Mick F went for an eye test at Vision Express. I was there and took my Optilabs glasses. They said that they could do them but they would be Oakely and expensive. They looked up varifocal photochromic, and they would have cost £500 or so.
I'll be sticking with my Optilabs, and when I REALLY need them renewing, I'll be paying £300odd to them.
Excellent service too.
My tactic when buying something expensive for cycling is to work out the likely cost per ride, which I am sure will work out to be quite low if your glasses last for years.