I solely wear contact lenses, but with spare glasses with me. I've been driving for 10 years and was using daily disposables. I would say that I would probably have had an issue where I had to take them out and use glasses instead whilst on duty about once or twice a year. I had a chat with my optician about dry eyes etc, especially with in cab a/c, and they suggested Acuvue Oasys two-weekly disposable. I can wear them constantly, even whilst sleeping, for a week. I've never had an issue with dry eyes at work since I started using them a couple years ago. You can now get them with "transitions" but I doubt they're allowed.