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What are lenses in different pieces trial lens set?

Posted by Junwei Wang on

Generally, trial lens set has 48 piece, 104 pieces, 158 pieces, 266 pieces and etc. All these pieces lenses including accessories lenses. Following is the specific lenses list: 1. Trial lens set 266 pcs Spheres: 40 pairs each of concave and convex 0.12D 0.25D to 6.00D in 0.25 steps 6.50D to 10.00D in 0.50 steps 11.00D to 14.00D in 1.00 steps 16.00D to 20.00D in 2.00 steps Cylinders: 20 pairs each of concave and convex 0.12D 0.25D to 4.00D in 0.25 steps 4.50D to 6.00D in 0.50 steps Prisms: 12 pieces 0.5 (2), 1.0 (2), 2.0 (2), 3.0-8.0(1) Accessories:14 pieces...

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What is Trial Lens Set?

Posted by Junwei Wang on

Trial lens set is an ophthalmology calculating apparatus used in the department of ophthalmology in hospitals and glasses shops to exam a patient’s refractive error including hyperopia, myopia, presbyopia, astigmatism, strabismus or color blindness. It usually contains sphere lens, cylinder lens, prism lens and other accessory lens, etc. 

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