Screens for vision problems
April 1st 2007

Available from Graham Coates (UK), I-test enables an occupational health professional to screen for the most common vision problems in minutes and discover whether the user needs to be referred to an optician for a full eye test.

The device is simple to use and does not require a power source. It combines the technology of a range of precision moulded plastic lenses in two optical disks.

Handheld like a pair of binoculars, the user looks through the lens window and rotates the optical disk wheels on each side until he or she can see as clearly as possible.

I-test can use a natural reference point, optotypes on a chart, a reading test, television screen or PC. It has an optical range of -4 to +4 diopetres for each individual optical disk.