? 158pcs audition lens sets are widely used by hospital ophthalmologists and opticians to check people's refractive status: hyperopia, myopia, presbyopia, etc. ? Product overview: Product name: 158pcs audition set Product material: leather case rubber ring optical glass Unit size: outer diameter 38mm, clear aperture 26mm Standard packing quantity: 158PCS Measuring range: SPH: 0.12-20.00DS Product net weight: 3.95kg Optometry box size: 45 37 10cm 17.7 14.6 3.9inches Applicable to: optical shop, vision care center, hospital, optometry training center, checking hyperopia, myopia, presbyopia, astigmatism and strabismus ? Warm tips: This trial box does not include ophthalmic prescription frames, which need to be purchased separately We also have other related glasses optometry equipment, welcome to order at any time No matter what problem you meet, please feel free to contact us, we will reply you within 24 hours.?Wide range of uses?: The optometry box is widely used in optical shops, vision care centers, hospitals, and optometry training centers to check hyperopia, myopia, presbyopia, astigmatism, and strabismus. ?Advanced Optical Glass?: The optical aperture of the audition lens group is 26mm, with wide field of vision, high light transmittance, easy to clean and maintain, and more comfortable to wear. ?Clear and convenient marking?: The degree of the handle is marked on the handle, which is convenient for use and inspection the mirror is engraved with the axis mark, so it is not easy to change the axis position. ?Sturdy and Durable?: This prescription lens has a longer service life, sturdy and durable, high-quality metal fittings, a combination lock to protect the lens and prevent it from being misunderstood. ?Optical Trial Lens Set Kit?: Optical Trial Lens Set Kit,Insert Optometry Box,Trial Lens Set BOX,Optometry Lens Case,High Light Transmittance,Long Service Life,26Mm Lens Clear Aperture.