I use THESE
https://www.amazon.com/gp/product/B00EKERBU4/ref=oh_aui_search_detailpage?ie=UTF8&psc=1.
They're inexpensive and they work great!Â* Bifocal, too!

On 10/26/2017 3:56 PM, wrote:
I find Zeiss Skyler "Fun" tint (in prescription lenses) excellent for gliding for all light levels from dull UK to strong South African.

BTW Zeiss advise pilots not to use polarised lenses mainly because their primary benefit is to reduce glare from polarised reflected light and that, they say, can make it difficult to see other aircraft that might otherwise have been picked up by the glint from the wings.

--
Dan, 5J