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
![Hiiii! What is the difference between the 1.57 high index and the 1.67 high index? And would I be able to get away with the 1.57 high index? I have provided my Hiiii! What is the difference between the 1.57 high index and the 1.67 high index? And would I be able to get away with the 1.57 high index? I have provided my](https://preview.redd.it/t9ej9xxukni81.jpg?auto=webp&s=6379c8547e6147a55b6a9b4d7d31e680552ef48a)
Hiiii! What is the difference between the 1.57 high index and the 1.67 high index? And would I be able to get away with the 1.57 high index? I have provided my
![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
![Index 1.57 Aspheric Photochromic Single Vision Lens Ar Coatings / Prescription Lens / Transition Lens/brown Gray - Eyeglasses Lenses - AliExpress Index 1.57 Aspheric Photochromic Single Vision Lens Ar Coatings / Prescription Lens / Transition Lens/brown Gray - Eyeglasses Lenses - AliExpress](https://ae01.alicdn.com/kf/HTB1a1UcKpXXXXbJXVXXq6xXFXXXF.jpg_640x640Q90.jpg_.webp)