UCanSee 266 pcs Optical Trial Lens Set Kit Metal Rim Aluminum Case

266 PCS Trial Lenses - The 266 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 266 pcs lenses in the case, with 160 pcs of spherical lenses, 80 pcs of cylindrical lenses, 12 pcs of prismatic lens, 14 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.