Review on Hydrotac Bifocal 20 3 00 Diopter by Brooke Daniels

Pros: The concept is good in theory. Technically, they should fit any pair of glasses. Cons: You can't really place them on your glasses. You must precisely match the curvature of these lenses to the curvature of your glasses. Otherwise, air will seep in and dry out the water that should form a seal holding it in place. I bought 3.0 lenses. Maybe they were thicker than the other starches. I do not know. I've tried them on several reading glasses. I've also tried them both outside and inside the glasses with no success. Maybe adding a drop or two of dish soap would strengthen the bond with water. Just like some phone/tablet screen protectors use a wet application to apply the screen to the device. (e.g. Skinomi brand). In summary, I definitely cannot recommend this product. However, the OPTX 20/20 brand makes excellent reading glasses. I have four or five pairs and such. Also, this item is non-refundable. something that surprised me.