1) 1.67 single vision lenses 
2) Refraction Index Nd= 1.67 
3) Abbe Value: 28 
4) Specific Gravity: 1.34 
5) Dia: 65 / 75mm

1.67 Aspherical single vision lenses have the same focal power throughout (top to bottom) and can be used to correct nearsightedness, farsightedness, astigmatism, or a combination of these disorders. Most people who wear glasses before the age of 40 have single vision lenses.

1.67 aspherical optical lens is up to 34% thinner and 32% lighter in weight than plastic. This lens material may be tinted, is scratch resistant and has UV protection.