Viltrox is a third-party lens ... and eye focus makes tracking simple. Viltrox has thought about the user when designing the 16mm f/1.8 as there are many elements that welcome ease-of-use ...

Eye-tracking is a function that displays a 3D image that corresponds to a viewer ... Broadening of the depth range can be realized by using a lens array with a long focal length and displaying ...

The contact lens itself can also “smooth out” some imperfections on the eye surface better than glasses ... (Photo Credit: iStock/Getty Images Plus) Wash your hands with soap and dry them.

In both cases, rays of light do not focus on the retina so a clear image is not formed ... can be corrected by placing a concave lens in front of the eye, as shown in the diagrams below.