This depends on your prescription. Overnight Glasses includes free 1.50 index, single-vision lenses, with a maximum prescription SPH of -3.25/+3.25, and a maximum CYL of -2.00/+2.00. If your prescription meets these requirements, you can get your lenses for free! However, you’ll still pay extra for tint, anti-glare coatings, and other add-ons.