peacefully offered the use of my glasses
haha .... nice idea. Maybe I should carry a spare set I get from Vinnies or somewhere so i can pass them through the window and then ride casually away. 
on a serious note, i have been an optometrist for the past 25 years and can tell you that MANY drivers:
A) Do NOT meet the minimum standard for driving in Australia.
Many understand the dangers, and still REFUSE to wear spectacles or contact lenses while driving, for reasons of vanity and stupidity...
B) No requirements in Australia for RE-EXAMING vision after Learner licence, UNLESS the GP informs Vic Roads that they become DIABETIC or have suffered major illness i.e stroke, acquired brain injury, or unless the optometrist reports a driver as a danger to himself and others thinking he will not wear specs when driving
Vision changes during life and many do NOT meet minimum vision requirements for drivers.
I drive and ride ALWAYS with the concept that the vehicle in front of me, does NOT meet minimal vision standards and does NOT SEE ME...
imho, the Australian law is FLAWED and needs to be changed that ALL drivers should be required to pass the minimum standard of vision, EVERY 2 YEARS, or do not get a renewal licence as done in most western countries!