Sorry. Not many English links on this page, yet.
An elevated cavity. No English version. But a quick tip. Decide which figure that has the top in the centre and turn the picture upside-down.
Flying prisms. No English version
3D Aquarium No English version
See 3D with sunglasses No English version. Here you should hold a dark sunglass in front of one eye and look at the movies. A small Swedish lesson. "vänster" = left, "höger" = right, "öga" = eye. Good luck.
Read letters in a distance of only a couple of centimetres, without they getting blurred. No English version
The triangle that doesn't exist
To my homepage-><-To my homepage