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The Guardian - UK
The Guardian - UK
Lifestyle

Do sunglasses wear out?

What do you mean, the shades are past it? Bob Hoskins and Cathy Tyson in Mona Lisa. Photograph: Herb
What do you mean, the shades are past it? Bob Hoskins and Cathy Tyson in Mona Lisa. Photograph: Herbie Knott/Rex

An assistant at my optician told me that over time the lenses of sunglasses wear out and no longer protect the eyes. She advised me to immediately get rid of my 1976 Ray-Bans (lenses by Bausch & Lomb) and replace them with something expensive. Is she right, or just trying to blind me into another sale?

Martyn Day, Twickenham

• Post your answers – and new questions – below or email them to nq@theguardian.com. Please include name, address and phone number

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