An important criterion in choosing VR glasses for smartphones is the viewing angle, which determines how much of the picture the user will see. The wider the viewing angle, the more comfortable it is to be in a virtual space. Virtual reality glasses are available with a viewing angle of 75 to 110 degrees.
The headset must have only one input device. It doesn’t have to be a key. It can just be a hole for your finger to press on the display. If the device does have keys, they are usually little levers that push the display for you. What can you do with a single button? Select menu items or perform simple and rather slow actions in games. Some VR glasses do without buttons at all: just tilt your head toward the desired menu section and linger for a couple of seconds. Or turn your head to change the direction of movement in the game. For example, the aforementioned Gear VR has a convenient control system – a touchpad on the side, similar to a laptop trackpad. It does not work perfectly, but it replaces several functions at once: swipes, scrolling, pressing, holding, and the “Back” action.
Adjustment of interpupillary distance allows you to use the glasses according to the anatomical data of the user, and focus adjustment – comfortably use the helmet for people with imperfect vision.
The kit includes interchangeable lenses and a soft base that will extend the time of use. You should also pay attention to the mount that holds your smartphone during the game, and the ability to adjust the straps that secure the glasses to your head.
Almost all virtual reality headsets can be worn over vision correction glasses. Many models provide the ability to adjust the distance between your face and the lenses. Where this cannot be done, however, the glasses can put pressure on the bridge of your nose.