The British College of Optometrists took a look at ready-made reading glasses and found that nearly half of them don't meet British and European standards. The ones with higher strengths tended to have the biggest problems. The researchers, from Bradford University, said that the readers they studied, all priced from £1 to £32 (€1.20 to €38.50-$1.55 to $49.80), did not use the ideal interpupillary distances for the work they were meant for. The full findings of the study will come out later this year in the Optometry and Visual Science journal of the American Academy of Optometry.