iPhones and other smartphones can be a huge help to the visually impaired, but few vision doctors are recommending them to patients, according to a study co-authored by a Loyola University Chicago Stritch School of Medicine ophthalmologist.

Researchers surveyed 46 low-vision adults from the Chicago Lighthouse and the Spectrios Institute for Low Vision in Wheaton, Ill. Participants’ best-corrected vision ranged from 20/70 to complete blindness.