Britain's Queen Elizabeth II last month underwent a successful operation on the eyes.
The Queen was out today at Westminster Abbey with her son Prince Charles to open the The Queen's Diamond Jubilee Galleries - a collection from the Abbey which dates from the 10th century.
Her real birthday is on April 21.
The queen does not usually wear shades outdoors in public; she wants the crowds that turn out to greet her to be able to see the whole package, as it were. And he was well enough to attend - unaided - the May 19 wedding of his grandson Prince Harry to the American actress, the former Meghan Markle. "I have to be seen to be believed", she has said about her job as head of state.
When cataracts develop, they can cause vision to become blurry or hazy.
The Press Association reported that she was treated as a day patient at the King Edward VII's hospital in London.
The Queen Mother had an operation to remove a cataract from her left eye when she was 95 in 1995, but after her surgery she spent a night in King Edward VII hospital, unlike her daughter.
Despite her age, the queen is known for her robust health and still carries out hundreds of engagements every year.
A cataract is a clouding of the lens in the eye, leading to a decrease in vision.
Cataract surgery typically takes just 30 to 45 minutes under local anaesthetic, but it can take an individual four to six weeks to fully recover.
It is the most common operation in the United Kingdom, from which it takes four to six weeks to recover.