Sorry to say it, but the most likely explanation is inattention due to onset of one or other form of dementia. An eye test is always worth having, but it will not pick up dementia, just possibly eliminate one possible explanation for missing red lights. The fact that he goes quiet probably means he is having some doubts himself. I served as a patient/public involvement member on a panel of medics and other clinical and DVLA representatives to draw up a set of recommendations to doctors and clinicians to develop a protocol for just such situations. The protocol was adopted nationally by all the relevant organisations. You are asking the question because you are uneasy. It might be something else, but please don't ignore it. I've been there - I'll be thinking of you. research.ncl.ac.uk/driving-and-dementia/consensusguidelinesforclinicians/
Do you have any favourite relaxing TV series or films?
