Closeups of Secretary of State Clinton taken during her Senate testimony Wednesday revealed that her head injury last month left her with lingering vision problems. As she testified about the ...

Unlike traditional cylindrical lenses or diffusers, Powell prisms can provide linear lighting with higher uniformity and stability, so they are widely used in laser processing, machine vision, ...

They may recommend attaching a press-on prism to one or both of your glasses' lenses to resolve the issue temporarily. If you ...

“Often, we can eliminate the double vision with prism lenses and/or vision therapy. Other times, eye muscle surgery is the best option,” Hopkins said. The patients that Hopkins sees in the double ...