On a late night in February 2011, two Princeton University researchers packed a small object into a box and set it out for the morning mail. The engineers had spent four years developing a new type of ...

CT is a useful tool in detecting and localizing intraocular and orbital foreign bodies. 1 However, total reliance on scan information may be injudicious. We present a case that illustrates an unusual ...

Researchers are developing lenses that can alter their focal length in response to changes in their environment. Hongrui Jiang and Liang Dong provide an insight into the field. If you wear glasses and ...

Microscope lenses are typically made either by grinding and polishing glass discs, or pouring polymers into molds – both techniques can be quite involved, which is reflected in the price of the ...