17 November 2010
Vol 2, Issue 58

About The Cover

Cover image expansion

ONLINE COVER In a Pig's Eye. A colorized image of a cut made in a porcine lens with a femtosecond laser. Ten-microjoule, 50-kilohertz pulses are made sequentially, 4 micrometers apart, to generate a precise, clean cut without damage to the surrounding tissue. The edges separate slightly, trapping gas bubbles in the gap. The femtosecond laser is one component of the instrument described by Palanker et al., which promises to deliver improved cataract surgery. [CREDIT: D. V. PALANKER/STANFORD]