Optical Ophthalmology Prism Group： Diopter (Δ): 1/2, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 25, 30, 35, 40, 45, 50. Ophthalmologists perform various trigeminal nerve examinations on patients' eye muscles for quantitative examination and walking vision training. High-Quality Materials： Made of high-quality optical glass material, safe and healthy, fine workmanship, smooth edges, high -quality aluminum alloy outer box, which is convenient for storage Trusted by Optometrists： This prism set has earned the trust and appreciation of optometrists for its reliable performance and accurate measurements. It is a preferred choice in the field, ensuring confidence in your diagnostic processes. Wide Application： Use in science education, optics research, and clinical settings, providing reliable and accurate measurements for a variety of purposes. Suitable for visual examinations for glasses shops, hospitals, schools, corporate ophthalmology departments. Service : Pour toute question, n;hésitez pas à nous contacter. Nous vous répondrons dans les 24 heures !