Sorry Alex are you referring to the trip to Durham to self-isolate near his parents, the second alleged trip to Durham of which Police could find no evidence, or the drive to Barnard Castle?
I have not seen any evidence, aside from BBC rants, that on any of these trips were undertaken when he was feeling so unwell as to affect his driving. Do you have a (respectable) link I could follow?
Regarding eyesight, if he was worried that his vision was sub optimal for driving, providing it was well above the legal minimum, I’d say (Covid rules aside) it was a responsible thing to put it to the test under relaxed conditions. I had to reject a new pair of glasses last year, as they didn’t work well for driving. The only way to ‘prove’ it was to allow the optician to make tweaks to how they fitted, then try them out for a few days, whilst driving around. At all times my vision was vastly superior to the legal minimum, but I still wanted better, and eventually got it - replacements are fantastic.