Sight for sore eyes

A sensor has been developed that for the first time matches the sensitivity of the human eye, according to its developers. The ambient sensor, called SFH 5711, can automatically adjust a monitor's brightness to that of the ambient light, leading to optimum readability, less power consumption and less strain on the eye.

It is produced by Siemens subsidiary Osram Opto Semiconductors. Like the human eye, the sensor is most sensitive to light at a wavelength of 560nm and can distinguish different levels of llight.

This means that a computer screen will automatically adjust its brightness according to changes in levels of light throughout the day. Small mobile terminals such as mobiles and PDAs will be far easier to read in all lighting conditions, including twilight.

Importantly, this could prevent the rapid onset of eyestrain - a common problem attributed to the brightness of PC and laptop screens that are used in dark surroundings. The sensor can also help drivers by registering ambient light when driving through a tunnel to turn headlights on automatically.