Capsular bag IOL subluxations are a nightmare. With time, many IOLs are dislocated, and managing them is a headache. My special guest in this column is Thomas Oetting, who has devised a sliding ...

Nicola Pugno, at the University of Trento in Italy, has succeeded in making by far the toughest material in the world -- by taking a conventional piece of fiber... and tying it in a slip knot. This ...

Many people find this an almost instinctive way to form a loop that tightens under load — a slip knot. It’s clearly based on the Overhand Knot and is an easy way to attach a line to a post or bar. To ...