The low-cost and not-so-attractive Wearality Air offers a 150-degree field of view that's free of the blurriness you may associate with other virtual reality viewers.
Wow, those are big lenses! Guess they function well for what they were made for: clear images all around.
I've read about some other VR headsets for smartphones that are attempting to improve their visual experience.... many with adjustable lenses. I don't think I'll ever get to try out all the VR headsets, but I'm especially excited about the Powis ViewR from http/powiscustom.com/products/powis-virtual-reality-kit. It has dual adjustable lenses, which is good since my eyesight varies in each eye. It's a great feature to have.