pop-tech Biconvex Lens Set, Glass Lens Bi-Convex 34mm Diameter 45mm Focal Length Lens for DIY Google Cardboard VR

They're terrible.I have a couple of the original Google Cardboard, and thought it would be fun to make my own. These lenses only focus around the middle of the lens, and I use the term "focus" loosely. Periphery vision is blurry and distorted. It kind of feels like you are underwater, or that you have water in your eye. Nauseating to say the least. I had a few other people compare them with the originals and they made the same comments. A definite step down in quality from the lenses that actually ship with Google cardboard.Edit 5/4/18Pop-Tech reached out to me and offered a full refund or replacement. Therefore I have upped my review to 3 stars because of their great after sales service.

Good!

Lenses were just fine for a few custom Google Cardboard viewers. Perhaps a tad overpriced, but we needed them in a hurry, so it's good to have 2-day shipping source.