We have Mr Edwin H. Land's cool combination of intellect and daring to thank for polarised lenses. As he wasn't a member of an educational institution, the American inventor had no choice but make covert night time visits to the lab at Columbia University to carry out his experiments. The results of his tenacity are on display in Persol 's sunglasses, which offer exceptional protection from the sun's harmful glare. The matte finish also lends a sophisticated feel to this tortoiseshell '54' pair.

• Matte brown tortoiseshell square-frame acetate sunglasses
• Polarised brown lenses
• Handmade in Italy
• 100% UV protection
• Comes with rigid case and cleaning cloth