mineral hi-index lenses
excellent optical character , not easy to scratch , adapt to correct middle and high xision bank , thin thickness improve the facade of patient wearing the glasses and make the eye comfort .
mineral white lenses
it is traditional material for the optical mineral lenses . it has advantage of big abbe number , small dispersive coefficient vd , high hardness , not easy to scratch , good ability of brave ultraviolet , low price and so on .
mineral photochromic lenses
this lenses will change the color permanently under the sun,but the orignal color will not change . it has high index and good optical capability . the color will change according to strong or ebbe light outside . the color changing time and fading time is very short . and this lenses are hard , durable , not easy to scrach , stable physical and chemical character , not easy to be cankered , good ability of brave ultraviolet . especially the color of each piece is name , so it is easy to adapt one pairs of this lenses or change any piece.
cr – 39 lenses
the weight is very light , it is only about half of mineral lenses . and it is not easy to be impacted . its disperisive coefficient vd. is small . transmission rate is high . this lenses can be tinted , hard coated and multi coated . it adapt to making aspherical and progressive lense .
丹阳市博大光学眼镜有限公司
蔡高美
15952917060
丹阳市司徒眼镜工业园万新路88号