1.49 CR39 Optical Lens
1.49 CR39 is Glasses Lens ,1.49 is Refractive Index,Lens have 8 type of Index of Refractive.Like 1.49/1.56/1.523/1.61/1.67 and So on ,The higher the Refractive Index ,The thinner the lens for same degree.But The higher the Refractive Index ,The more uncomfortable it is to wear.1.49 another name is CR39 Lens materials is Resin.
1.49 is the minimum refractive index So best comfortable for our eye .Many of country like this lens but because this lens It's thicker than the others,So many of people don't like this lens 1.49 lens is best comfortable and also best thick lens.This is it weakness and strength.
If let you choose which lens you want ? Beautiful or comfortable?1.49 Also have another Adevantage,It's lens material is hardness So many of customer buy 1.49 UC lens and this index without HC.Do you know why?Yes because of itself hardness.
1.49 only have UC /HMC no HC.Do you remember? So when you want buy 1.49 Lens don't tell supplier "I want purchase some 1.49 HC Lens "Supplier will know your're not professional so will give you high price earn more money from you .And 1.49 HMC The most common is Green /Blue coating .Like this picture.
