Table 1.

Search terms used in the systematic search of the literature.

POPULATION	EXPOSURE	OUTCOME
Child* “young person” “young patient*” “children and young people” CYP “paediatric patient*” “pediatric patient*” “special school*” student* “intellectual difficult*” “intellectual disabilit*” “learning difficult*” “learning disabilit*” “neurological impairment” “developmental delay” “developmentally delayed” “complex needs” “complex disabilit*” “special needs” “special education needs” “special educational needs” SEN “multiple needs” “cognitive impairment” “Cerebral Palsy” “Down syndrome” “brain injury” “preterm birth” Premature	“vision assess*” “visual assess*” “visual acuity test*” “vision test*” “visual function test*” “functional vision test*” “visual function assess*” “functional vision assess*” “visual ability”	vision “visual acuity” “visual function” “color vision” “colour vision” “visual field” “contrast sensitivity” “functional vision” “visual impairment” “vision impairment” VI “cerebral visual impairment” CVI
Population terms combined with OR Exposure terms combined with OR Outcome terms combined with OR Search used Population terms AND Exposure terms AND Outcome terms