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Prism goggles are perfectly suited for class room demonstrations, as the effect shows already within half a minute. The effect of the demonstration is guaranteed to be intriguing. Prism goggles are also most suitable (and cheap requisites) for pratical courses, and own experiments. A plentitude of issues can be studies with this simple device. You might take inspiration for own experiments from our own experiment described on the previous page. There are no limits to phantasie. For instance, Martin et al. studied the transfer of learning overhand clay ball throwing to underhand throwing. Clay balls were chosen because they stick at the target and ease data acquisition.

This page does not contain an experimental design. Please take suggestions from the above paragraph, the previous page, and the literature. There remains only one problem:

We offer a set that will allow you to produce better and even cheaper goggles. The set consists of two polycarbonate Fresnel prisms, plus an instruction that you can give to your optician on how to mount them. She can then mount these goggles on a cheap glasses frame of your choice (in Germany there is, e.g., quite a choice of frames for EUR 10.23 at Fielmann). Usually, she would not take any fee for the mounting (but if so it is EUR 11.00 at Fielmann).

We buy the prisms from Fresnel Optics. They are originally much larger. By cutting them down to 52x43 mm the costs for a set can be kept low. Due to the offer of blanks we can offer only two deflection agnles: 12° and 16°. The costs are slightly higher for 12° prisms as the original size is smaller there. With 16° the filed of view is slightly smaller to the side of the base of the prism due to total reflection. This does under normal circumstances not interfer with the experiments. Evidently, the effects are larger with a larger deflection angle. If mounting the base left-hand (wearer viewpoint) in both glasses (this is our standard and what we tell in the mounting instructions), the wearer will see things more right-hand and initially grasp more right-hand than needed, and vice versa.
 

Picture of prism goggles, 16°, base left-hand (wearer viewpoint), mounting by Fielmann. Please note that the through-prism sight of the earpieces is offset. The prism base is right-hand (observer viewpoint), so the earpieces are seen to the left of their normal position. The pictures on this page were done by Carsten Bogler.

If you are interested follow the ordering instructions below. Enjoy...
 

The offset effect of the prisms gets more clear on this picture, due to the underlying line structure.