Problem: To make sure they target the right parts of the cornea during vision-correcting Lasik surgery, doctors rely on a scanner that responds to eye movements and redirects laser pulses. Today’s scanners cost thousands of dollars and still offer less than ideal precision.
Solution: At the University of California, Berkeley, researchers in the Microfabrication Laboratory used inexpensive techniques to build a microscale scanner that moves up to 30,000 times per second, up from the 4,000 times per second of conventional technology. Graduate students Hyuck Choo and David Garmire invented a way to carve one piece of silicon into two interlocked comblike structures. Applying a voltage to one comb makes the other move up or down. A mirror attached to the combs redirects a laser beam. While “comb drives” are already used in some microelectromechanical systems (MEMS), the combs have had to be built on separate silicon wafers and wedged together manually. Because the new device is easy to manufacture, “this is not just an incremental step but a major development,” says Roger T. Howe, the Stanford University electrical engineer who invented the comb drive in the 1980s. Choo says the technology could be cheaply incorporated into surgical scanners and other devices.
This startup wants to copy you into an embryo for organ harvesting
With plans to create realistic synthetic embryos, grown in jars, Renewal Bio is on a journey to the horizon of science and ethics.
VR is as good as psychedelics at helping people reach transcendence
On key metrics, a VR experience elicited a response indistinguishable from subjects who took medium doses of LSD or magic mushrooms.
This artist is dominating AI-generated art. And he’s not happy about it.
Greg Rutkowski is a more popular prompt than Picasso.
This nanoparticle could be the key to a universal covid vaccine
Ending the covid pandemic might well require a vaccine that protects against any new strains. Researchers may have found a strategy that will work.
Get the latest updates from
MIT Technology Review
Discover special offers, top stories, upcoming events, and more.