【Optical Ophthalmic Prism Set】The triangular prism has 16 straight angle prism composition:1/2,1,2,4,6,8,10,12,15,20,25,30,35,40,45,50. Composed of Sixteen prism degrees. Conveniently housed in a durable aluminum casing, providing secure storage and convenient transportation. 【Function distribution】This product is supplied to major ophthalmology hospitals for dispensing glasses, for ophthalmologists to carry out quantitative examination of eye muscles and training of strabismus vision for patients with various prisms. 【Optical Correction Principle】When light passes through a prism, it will refracted toward bottom surface, and the object image moves toward the tip, constantly changing the optical power of the prism. Both eyes will have a common visual direction, easily eliminating double vision. 【Visual Impairment Application】It can be used for small-degree paralytic strabismus, paralytic strabismus with diplopia or extraocular muscle dysfunction caused by trauma, under- or over-correction after strabismus surgery, or small-degree paralytic strabismus, especially It's cephalic strabismus. 【Scope of Application】Our Prism Bar Set is ideal for use in science education, optics research, and clinical settings, providing reliable and accurate measurements for a variety of purposes.