One of the most widely used medical devices is the contact lens worn by millions of people daily.

The material science and technology in such a small device is amazing in the form of soft and hard lens with varying degrees of air permeability. Performing a strength and elastic stretch test on such a device is challenging, the lens must be held to prevent slippage during the test but not to cause fracture or damage, ambient conditions need to be managed simulating conditions of use.

Another important test performed on contact lenses is a tear test, simulating someone rubbing their eyes while they are wearing lenses. This too requires special grips that can prevent slippage but still not damage the sample or induce a premature break or tear.

Tinius Olsen has the expertise having successfully supplied strength test systems to contact lens manufacturers.