Bernell BC 50s Tranaglyph Binocular Vision Training Slides
 Catalogue Number: 4203 Bernell BC 50s Tranaglyph Binocular Vision Training Slides Category: Equipment Sub-Category: Vision Therapy Equipment Corporation: Bernell Corporation Year Of Publication/Manufacture: 1980 Time Period: 1940 to 1999 Place Of Publication/Manufacture: South Bend, Indiana Publisher/Manufacturer: Bernell Description Of Item: Incomplete set of translucent tranaglyph slides (255 x 138 mm) printed in red and green with reversible red/green filters in blue-grey plastic sleeve. Slides are BC/51, BC/52, BC/54 and BC/ 56 (BC/53 and BC/55 missing). All imprinted with four sets of separated images in red and green with increasing disparity between images. Instruction cards present for all slides from BC/51 to BC/56. Used for fusional convergence and divergence training depending on which eye has the red filter.TRANAGLYPH ORTHOPTIC SLIDE with the appropriate number and 1980 BERNELL CORP. South Bend, IN printed on borders. Plastic sleeve 285 x 180 mm.See also Cat. # 3670. Historical Significance: Bernard Vodnoy established the Bernell Corporation to produce a number of binocular vision testing and vision training equipment that could be used in-office or for home based vision therapy. How Acquired: Donated by Margaret Banks Date Acquired: 28/10/2019 Condition: Excellent condition but 2 slides missing Location: Archive office. Pamphlet and ephemera filing cabinet. Drawer 10 |