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Treating cataracts in the 21st century

• Brief but interesting article highlighting that one billion people in the world have preventable or treatable visual impairments; 300 million of these are cataracts, which accounts for 50% of blindness worldwide. A cataract is an opacity in the lens of the eye, often caused by ageing, and can be fixed with surgery: a small incision, fragmenting the lense, emitting ultrasound to aspirate the cataract.