probably a silly question however here goes.. was wondering whether glacier type sunglasses would be needed on an ascent of the matterhorn.
could snow blindness or strong sunlight higher up be an issue?
In reply to colina: yes the sun and glare from the snw high up is an issue. Unless Its very dry when you climb I think sunnies are essential kit. I wouild use cat 4s. And I would lend a pair to a partner daft enough not to have their own.
I think people overestimate the need for higher cat lenses. I did the Haute Route in very sunny conditions and felt fine using Cat 3's. I think just having good UV properties is the main thing. If you get a modern well fitted pair that sit close to your face i think you can dispense with the glacier style side flaps.
In reply to colina: defiantly need cat 3 or 4 sunglasses. when i did it there wasnt a cloud in the sky and it hammers you when you get on the snow on the shoulder. think it would give you a right headache!