"285 million people are estimated to be visually impaired worldwide:
39 million are blind and 246 have low vision. (WHO 2014)"
The expanding elderly population in many countries, coupled with advances in treatment and in neonatology continue to steadily increase the likelihood that your eye care practice will be called on to care for a growing number of patients with low vision.
"Vision impairment is defined as the best-corrected visual acuity less than 6/12 (<20/40) in the better-seeing eye. (NIH/NEI 2014)"