Jonathan+K's+physics+picture

In the photo, the light is being refracted through the two pairs of glasses, in between the pairs, near the top of the page, this is especially apparent as the top of the step is completely above the refracted image in the glasses. The light is bent so that the steps appear to be farther away and/or placed lower than they actually are. In the top left hand corner of the glasses, there is refraction of an object that you can actually see. When the image of the stairs goes through the medium, the light is refracted because it travels at a different speed.