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104 PCS Trial Lenses - The 104 pcs trial lenses are made of glass with a metal rim, which gives accurate diopter and a high light transmittance, very important for optometrist and vision testers.
Large Metal Rim - Features a 36 mm inner diameter and 38 mm outer diameter, providing a wide field of vision, making the test result more accurate.
Easily-Distinguished lenses - Including 104 pcs lenses in the case, with 72 pcs of spherical lenses, 24 pcs of cylindrical lenses, 4 pcs of prismatic lens, 4 pcs of accessories. Each lens handle is engraved with markings, and the lens power is printed on the tray.
Aluminum Box - This case is made of premium aluminum with a combination lock. The lock comes factory set to 000. Open it by pushing the button outward and reset the combination to whichever 3 digits you like while pushing the button inward. Please remember the password you set, or you will no longer be able to open or close it.
Widely used - It is very useful for optometrists, vision testers and household use to exam a patient’s refractive error - including hyperopia, myopia, presbyopia, astigmatism, strabismus or color blindness.
104 Trial lens set including: Spheres: 18 pairs each of concave and convex 0.25D to 2.00D in 0.25 steps 2.50D to 4.50D in 0.50 steps 5.00D to 8.00D in 1.00 steps 10.00D Cylinders: 6 pairs each of concave and convex 0.25D to 1.00D in 0.25 steps 2.00D to 3.00D in 1.00 steps Prisms: 4 pieces 0.5 , 1.0, 2.00, 3.00 Accessories: 4 pieces BL, RF, FL Cross cylinder 1 piece: 0.25 or 0.5