I can't wear contact lenses. With so many product improvements in recent years, just about everyone can wear contacts. For example, there are now bifocal contacts for people with presbyopia, and soft contact lenses that correct astigmatism. A lens will get lost behind my eye. A thin membrane covers your eye and connects to the inside of your eyelids, making this a physical impossibility.
Contact lenses are uncomfortable.
After a brief adaptation period, most people don't even notice they're wearing contacts. Contacts can get stuck to my eye. Contacts are too much trouble to take care of. Wearing contacts causes eye problems. In general, this is not true if you're a conscientious wearer.