Thanks David for the professional advice.
Interestingly I stopped wearing sunglasses when working in South West Africa, I visited an optician in Cape Town for a check up and his advise was either invest in Zeis glasses or don’t wear any and you will accustomed to it. He was right I haven’t worn any since 1973.
I'm looking into the Zeiss Duravision Drivesafe sunglasses.
