Agreement amongst consultant ophthalmologists on levels of visual disability required for eligibility for certificate of sight impairment : Sight impairment registration using binocular composite visual fields.
Jawaid I, Stead RE, Rotchford AR, King AJ.
Eye (Lond). 2021 Jun;35(6):1644-1650. doi: 10.1038/s41433-020-01126-0. Epub 2020 Aug 24.
PMID:32839558
Visual impairment in severe and profound sensorineural deafness.