More than half of the reading glasses tested by Hong Kong’s consumer watchdog failed to label pupillary distance, a key measurement for aligning lenses to ensure clear vision and reduced risk of eye strain. The Consumer Council tested 17 models of ready-to-wear reading glasses between January and May this year, with the claimed degree of presbyopia for all models being +2.50 or +2.5 dioptres – commonly known as 250 degrees. The product prices also ranged from HK$8 to HK$490. The watchdog’s...