The Optics Enhancer can be bought from Doctor Usanagi in New Vegas clinic for 4,000 caps, designed to improve eyesight of the person it's installed in.
If you have a perception of 3 or lower, you can get this implant for 3000 caps instead.
- "The Optics Enhancer, as the name suggests, gets attached directly to your optic nerve. The price is 4,000 caps." - Dr. Usanagi