Most dental policies cover preventive care at 100%, so you do not have to pay for routine cleanings, exams, or x-rays. Routine visits are important because they catch small issues before they require complex, expensive treatments. 

If you need corrective lenses, you know how quickly the costs can add up. Frames, lenses, anti-glare coatings, and contact lenses can easily run into hundreds of dollars out of pocket. Vision insurance typically provides an annual allowance or heavy discounts on frames and contacts, savings you a massive chunk of money.