Comprehensive Optical Prism Set: This optical ophthalmic prism set includes 18 triangular prisms, featuring angles of 1, 2, 3, 4, 5, 6, 7, 9, 10, 15, 20, 25, 30, 40, 50, 60, 80 degrees, designed for versatile applications in vision testing. Versatile Usability: Ideal for use in optical clinics, hospitals, educational institutions, and corporate ophthalmology settings, this optometry tool caters to a wide range of visual assessment needs. Light Refraction Principle: As light passes through the prism, it refracts downward, causing the image to shift toward the tip, thereby altering the optical power. This mechanism assists in aligning both eyes, effectively reducing double vision. Precise Eye Deviation Measurement: Engineered to assess both vertical and horizontal eye deviations, the Prism Bar delivers accurate readings on latent or manifest deviations, making it a crucial tool for strabismus treatment and eye muscle training. Service: If you have any questions, please feel to contact us, and we will reply within 24 hours!