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Can you trust £70 specs from the supermarket? As Asda and Tesco take on the opticians, an eye expert examines if cut-price glasses are a prescription for trouble | Daily Mail Online
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![Can you trust £70 specs from the supermarket? As Asda and Tesco take on the opticians, an eye expert examines if cut-price glasses are a prescription for trouble | Daily Mail Online Can you trust £70 specs from the supermarket? As Asda and Tesco take on the opticians, an eye expert examines if cut-price glasses are a prescription for trouble | Daily Mail Online](https://i.dailymail.co.uk/i/pix/2012/04/24/article-2134165-12BC49F4000005DC-442_468x286.jpg)