Pronunciation: [sˈuːdə͡ʊskˌə͡ʊp] (IPA) 
The word "pseudoscope" is spelled with a silent letter "p" and pronounced as [soo-duh-skohp]. The first syllable is pronounced as "soo" with a long "u" sound, followed by "duh" with a short "u" sound. The second syllable is pronounced as "skohp" with a soft "s" sound and a long "o" sound. A pseudoscope is an optical instrument that uses mirrors to invert the image seen by each eye, causing the depth perception to be reversed.
A pseudoscope is an optical instrument or device that is designed to alter the perception of depth and spatial relationships in a visual scene. When viewing an object through a pseudoscope, the typical perception of depth is reversed, meaning that objects that appear to be closer actually appear further away, and vice versa.
The pseudoscope achieves this visual effect by interchanging the images seen by each eye. Normally, our eyes receive slightly different images, allowing us to perceive depth and three-dimensionality. However, the pseudoscope deludes the eyes by presenting the image seen by the left eye to the right eye, and vice versa. Consequently, the brain interprets the visual information incorrectly, resulting in a distorted perception of depth and spatial relationships.
Introduced in the 19th century, the pseudoscope has been used for various scientific and artistic purposes. It has been employed in psychology experiments to study the perceptual aspects of vision, as well as in vision therapy to improve visual coordination and flexibility. Additionally, artists have explored the pseudoscope to challenge and manipulate viewers' perceptions, creating intriguing and mind-bending visual experiences.
Due to its ability to deceive the eyes and alter visual depth perception, the pseudoscope remains a unique and interesting tool that continues to fascinate scientists, artists, and those interested in exploring the complexities of human vision.
In optics, an instr. which exhibits bodies, with their proper appearance as regards relief, reversed-thus a hollow body appears as if solid and convex.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "pseudoscope" is a combination of two Greek roots: "pseudo" meaning false or fake, and "skopein" meaning to see or to look at. So, etymologically, "pseudoscope" means "to see falsely" or "to perceive things in an altered manner". The term was coined in the 19th century to describe an optical instrument that reverses the depth perception of a visual scene, making objects that appear closer to the viewer seem farther away, and vice versa.
