College of Optometrists public information site.
SLD / DYSLEXIA
International Institute of Colorimetry (Andy is a member)
Tom’s story a video about one young man was helped by precision tinted lenses
Cerium Visual Technology, makers of the Intuitive Colorimeter and Precision Tinted lenses:
NHS Choices website up to date rules on eligibility for NHS tests etc :
Seeability Eyecare for people with learning difficulties.