Gwyn McCormack is a Qualified Teacher of Vision Impairments, has spent many years as a teacher, first in mainstream secondary school and then as a Qualified Teacher of Vision Impairments in a peripatetic support service.
She also spent five years managing a local authority peripatetic support service for children with vision impairments before leaving to set up her company Positive Eye in 2008.
She now presents training nationally and internationally – 10 countries, including America, and has also developed a unique product range of 33 resources some of which are general for children with Special Educational Needs and Disabilities (SEND) and Additional Learning Needs (ALN).
You can find her website here: https://www.positiveeye.co.uk/
The research by Koenig and Farrenkopf (1997) here: https://eric.ed.gov/?id=EJ539207