Ocular implant

An ocular implant is a device which replaces or enhances the eyesight of an individual.

In the Federation, ocular implants gave eyesight to blind or visually disabled individuals. In 2365, USS Enterprise-D chief engineer Geordi La Forge felt that the technology was not advanced enough to afford the same visual range as a VISOR, but by 2373, he had decided to receive ocular implants. These implants appear similar to normal humanoid eyes, but upon closer inspection reveal mechanical detail on the irises and pupils. They offer visual acuities beyond those of ordinary eyes, including infrared heat detection and telescopic zooming.

Marx Richtor sported an ocular implant in the mirror universe.

Adapted from Memory Alpha -- the free Star Trek reference