1. Maino DM, Rado ME, Pizzi WJ. Ocular anomalies of individuals with mental illness and dual diagnosis. J Am Optom Assoc. 1996;67:740–8.
2. Neilsen LS, Skov L, Jensen H. Vision screening in children with developmental delay can be improved: analysis of a screening programme outside the ophthalmic clinic. Dev Med Child Neurol. 2007;49:508–12.
3. DOCET. General Optical Council, 2000. Making a difference: professional eye care for people with learning disability. URL:
http://www.docet.info/cms/archive/
4. Nielsen LS, Jensen H, Skov L. Risk factors of ophthalmic disorders in children with developmental delay. Acta Ophthalmol. 2008;86:877–81.
5. Pilling R. The management of visual problems in adult patients who have learning disabilities. Ophthalmic service guidance. London: Royal College Ophthalmologists; 2011. p. 1–27.