> you don't have to plan your annual visit to the optometrist 3 months in advance Actually, US health insurance plans generally don't cover optometry. That's

> you don't have to plan your annual visit to the optometrist 3 months in advance Actually, US health insurance plans generally don't cover optometry. That's a separate "vision" plan that you generally only get through an employer if you are lucky. If you don't have it such a plan, you pay out of pocket.