Check the listing for details. OPTX 20/20 Hydrotac Stick On Bifocal Lenses +2.50|Magnify Adhesive Reading ReUse. Condition: New. Listed at 19.51 USD. Calabria Hydrotac Stick on Bi-Focal Lenses are designed to be minimally noticeable while adding magnification to any eyewear. Use for any pair of glasses including safety glasses, goggles, blue light blocking glasses or sunglasses to convert them into distortion free optically correct bifocal readers. Customize to your desired fit, simply trim the stick on lenses to the size you need. Add water to adhere to the lens then easily remove by peeling off the lens leaving no residue and save for the next time your everyday eyewear needs to be converted into a bi-focal pair. Hydrotac lenses turn any eyewear into reading glasses with superior clarity. Adhere with just a drop of water! Lenses are removable and reusable. OTHER LENS POWERS COMING SOON 1.2 inches in diameter Material: Polymer Aspheric Removable and Reusable Trim with scissors to customize shape Fits ALL Eyewear MADE IN THE USA Listing and template services provided by inkFrog