Hi folks,
After some research I've found that the lenses I'm wearing, and have been pretty content with, are CR39. In the course of researching materials (from a non eyecare professional perspective), I have heard that Essilor's Aspheric lense 1.67 high index is a good option for someone like me trying to improve periphery.

What are your opinions on this? I'm more concerned with quality of peripheral vision than thickness of lenses.

Also, is there such a thing as CR39 Aspheric or Bi-Aspheric lenses? And would that be yet a better option for improvement in the periphery of the lenses?

Thanks,
Phil

my rx:
OD SPHERE CYL AXIS
+5.75 -150 105
OS SPHERE CYL AXIS
+3.75 -150 180