Plastic CR39
Plastic CR-39 Lenses are the most basic and affordable lens material on the market. Prescription Plastic lenses are almost half the weight of traditional glass lens material and are significantly more resistant to shattering then glass lenses.
When deciding if the Standard Plastic lens material is right for your prescription, we recommend that this lens material is for people with prescription powers that are less than a + or – 2.50 in the Sphere power field and with Cylinder powers of less than + or -2.00 dioptres.