So ..... Changed my glasses from varifocal back to single vision, with no photochromatic finish. I was struggling with reading really small serial numbers off our computer systems, and it's just as easy to pull the specs off and read.
For cycling (and general use) will be contact lenses a quality pair of polarised sunglasses from Ray Ban or Oakley. For reading,need to buy some +1 reading glasses from boots.
Looking forward to my ride tommorow :-)