Between 1825 and 1840, the relevant technologies of stroboscopic animation, photography and stereoscopy were introduced. While known colloquially as "3-D" photography, the more accurate term is stereoscopy. Lenticular book is also called stereoscopy or 3D book. The video makes extensive use of wiggle stereoscopy. She also works in stereoscopy, supercomputing and virtual reality. He pioneered the use of stereoscopy from planes for topographic purposes. In that same year, Platige produced its first commercial short that utilized stereoscopy, LECH Run. IPD application is found in stereoscopy, virtual reality headsets gaming, education and training. It marked a significant milestone in stereoscopy. The product of these separate measurements predicted the apparent depth expected with full-pupil stereoscopy. However, these examples do not employ any of the stereoscopy techniques that characterize phantograms. For true stereoscopy, each eye must be provided with its own discrete display. Pulfrich was employed to develop stereoscopy from being pure entertainment to a powerful quantitative technique. Early work focused on sparse correspondences for stereoscopy. Stereoscopy may be used to detect retinal thickening.