Specification:Item Type: Vision Tester ToolMaterial: AcrylicRange of Training: Amblyopia, Strabismus, Simultaneous Vision and Stereopsis Purpose: Separates the visual field on both sides using a prism, a plane reflection mirror is fixed on the prism. The dominant eye gazes at the captured visual target or visual image placed on the side plate by reflecting off the plane mirror. The signal is transmitted to the opposite eye (i.e., the amblyopic eye facing the direct aperture) through the brain, and is projected onto the bottom plate. Then, catch, draw, and fuse images are trained on the bottom plate to improve vision, eliminate suppression, and establish simultaneous vision and stereopsis in patients with amblyopia or strabismus, resulting in good effects.How to Use:1. Place the bottom plate on the desktop. 2. Use two longer screws to fix the prism with the reflection mirror and the transparent plate onto the bottom plate. 3. Use shorter screws to fix the end ring at the top of the prism.packing list:1 x Base Plate1 x Oblique Divider1 x Transparent Plate1 x Lens Ring1 x Lens Ring Piece2 x Lens16 x Sheet of Training Card1 x Clip3 x Screw1 x Instruction ManualNote:Without red and green glasses.