![1.56 1.61 1.67 1.74 Index Optical Resin lenses Clear Anti UV Lenses Myopia Cylindrical Glasses Eyeglasses Aspherical Spherical|Eyewear Accessories| - AliExpress 1.56 1.61 1.67 1.74 Index Optical Resin lenses Clear Anti UV Lenses Myopia Cylindrical Glasses Eyeglasses Aspherical Spherical|Eyewear Accessories| - AliExpress](https://ae01.alicdn.com/kf/H44dceffb213048698495e9d011a7d044V.jpg)
1.56 1.61 1.67 1.74 Index Optical Resin lenses Clear Anti UV Lenses Myopia Cylindrical Glasses Eyeglasses Aspherical Spherical|Eyewear Accessories| - AliExpress
Recently, I replaced my 1.61 index lens with 1.67 and the prescription is the same. But after that, I felt some strain in my eyes. Is this a lens quality issue? - Quora
![Help me figure out how thick my eyeglass lenses will be. - glasses prescription index | Ask MetaFilter Help me figure out how thick my eyeglass lenses will be. - glasses prescription index | Ask MetaFilter](http://static.zennioptical.com/image/common/static/Index-Comparison.jpg)
Help me figure out how thick my eyeglass lenses will be. - glasses prescription index | Ask MetaFilter
![1.61 Optical Cr39 Single Vision Lenses MR-8 Monomer ASP UV400 HMC Coating - Buy optical lens, Glasses Prescription Lens, Eye Optical Glasses Product on Jiangsu Aogang Optical Glasses Co., Ltd. 1.61 Optical Cr39 Single Vision Lenses MR-8 Monomer ASP UV400 HMC Coating - Buy optical lens, Glasses Prescription Lens, Eye Optical Glasses Product on Jiangsu Aogang Optical Glasses Co., Ltd.](https://5krorwxhkqjiiij.ldycdn.com/cloud/iqBqkKkqRilSroooojko/1-61-ASP-UV400-HMC.jpg)