It's the final day of our 12 lenses of Christmas countdown ... especially for such a budget-friendly yet full-frame compatible lens. Next up were Viltrox lenses, both little and large.

Here’s what else the next frontier of wearables could do. We already have contact lenses that contain more than one prescription, enabling the wearer to adjust her focus depending on the ...

Smart contact lenses are also being developed to improve vision in groundbreaking ways. Some lenses can adjust focus ...

Silk, Alvin J., Bruce Issacson, and Marie Bell. "Vistakon: 1 Day Acuvue Disposable Contact Lenses." Harvard Business School Case 596-087, March 1996. (Revised February 1999.) ...