Published: | Last updated: | Publisher: Smart Vision Optometry
At a glance
Coloured overlays should not be presented as a proven cure for reading difficulties. A child’s visual symptoms and learning needs deserve appropriate assessment, with clear discussion of the evidence behind any recommended support.
What was tested in the Irlen overlay study?
Coloured overlays are transparent coloured sheets placed over printed material. Ritchie and colleagues’ 2011 study of Irlen overlays found no demonstrable immediate improvement on its reading measures in children with reading difficulties. That result concerns the intervention and outcomes tested; it does not identify the cause of an individual child’s symptoms.
A report that text feels more comfortable is a different claim from a demonstrated improvement in reading skills. Ask which outcome is being promised and what evidence supports that outcome.
Assess vision and learning concerns appropriately
RANZCO’s guidance on learning difficulties describes dyslexia as language-based and supports evidence-based educational intervention. Eye care should not replace the appropriate learning assessment.
An eye concern identified through screening may need a detailed examination, as described in AAPOS vision-screening guidance. Our children’s eye assessment information explains where to begin a conversation about visual symptoms. Our guide to children’s eye tests and their limits explains the roles of screening and examination.
For related context, read our article on visual skills assessment and its limits. A recommendation should identify a specific problem and explain what the proposed support is intended to change.
Questions before buying a filter or overlay
Ask for the assessment findings, the intended outcome, the evidence, total costs and the review plan. Ask whether educational support or another referral should proceed at the same time. Avoid treating a product purchase as a substitute for understanding the difficulty.
Frequently asked questions
Did the cited study prove that Irlen overlays improve reading?
No. The 2011 study found no demonstrable immediate improvement on the reading measures it tested. Its result should be described within that scope.
Should an eye appointment replace a learning assessment?
No. Vision and learning assessments address different questions. When both are concerns, discuss the appropriate pathways with the relevant professionals.
What should I ask before purchasing coloured overlays?
Ask which problem has been identified, what outcome is expected, what evidence supports it, what the total cost is and how progress will be reviewed.
To discuss an eye assessment, book an appointment or call Bondi (02) 9365 5047 or Mosman (02) 9969 1600.
