When approached, a Buckingham Palace spokesman said: "I can confirm that the Queen successfully underwent a short planned procedure to treat a cataract last month".
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The 92-year-old monarch underwent the successful procedure in May.
The reporters found that Elizabeth had surgery in a private London hospital King Edward VII.
She did not have to cancel any official engagements after the treatment, a royal source said, although at some recent events, the queen has been pictured wearing sunglasses.
When cataracts develop, they can cause vision to become blurry or hazy.
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The last time Queen Elizabeth was in hospital was in 2013 at age 86 after she suffered a bout of gastroenteritis.
A cataract is a clouding of the lens in the eye, leading to a decrease in vision. It is the most common operation performed in the United Kingdom, taking 30-45 minutes, and has a high success rate. It can take four to six weeks to recover.
Next week, Queen Elizabeth will travel by royal train to Cheshire, accompanied by Meghan Markle.
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