I have had trouble with 1.70

[rob.optician]

A couple patients lately have been very sensitive to the switch from 1.59/1.60 to 1.70.

Anyone else a lot of trouble with this?

I know the higher index has more distortions in the lens and is causing this.

[For-Life]

what are the exact problems?

[Fezz]

I would double check base curve. I have had very little problems with the 1.70 material. It may be that the new lense(Hoya) may be on a flatter curve. The 1.70 from Hoya has a higher Abbe value(36)than the 1.67 materials(32). So that should not be an issue.

[rob.optician]

Problems patients complain of -

They CAN see far way good - but looking up close or to the side...turning their head at all causes everything to get wavy - making pt. very dizzy and feels like they're getting sick.

Same Rx. as 1.60 and no problems w/ 1.60


I'm already getting the lenses remade in 1.60 so I will check both b.c.'s to see what the difference is.

I have a pair of 1.67 and 1.70 lenses - same lens shape, same rx. and when I put the 1.70 on it takes me about 10 minutes to adjust to them b/c everything is like I described above...things are just kinda wavy - like I just drank a few beers in a short period of time lol.

[kdog2020]

I have 1.67 and a new pair of 1.70 lenses, both needed to have a little wrap added to the frame to move the periphery back out of my field of vision. When inserting high index lenses into most frames a little frame adjustment is needed to make up for the flatter base curve of the high index lens.
just my .02