Published: 16 November 2022 | Updated: 29 September 2026 | Author: Smart Vision Optometry
Editorial and clinical update — 29 September 2026: The original article/interview below has been restored from the verified pre-edit recovery source, preserving its editorial structure and attributed quotations. Current evidence and guidance below should be relied on where older wording differs.
What you need to know about Irlen Syndrome and its treatment
Irlen Syndrome is a visual perception processing disorder. According to statistics, Irlen Syndrome is identified and treated appropriately, in one in two children and adults worldwide with learning and perception issues. However, leaders in the field of behavioural optometry, like Gary Rodney a fellow of the International Academy of Orthokeratology and Myopia Control (FIAOMC), are now debating whether these figures really reflect the causes of perception issues or whether they are the outcome of incorrect diagnoses brought on by subpar eye exams.
What is Irlen Syndrome
Irlen Syndrome is thought to be a neurological disorder that leads to the brain being overactive or overstimulated, which creates a breakdown in communication between the brain and eyes, affecting how people perceive and therefore process what they see. This can cause issues with accuracy and understanding as well as attention deficit, handwriting, and visual distortion when reading. Sensitivity to light, headaches while reading, and seeing distorted images and text on pages are some other signs and symptoms. The patient is thought to have an abnormal sensitivity to certain light wave lengths, thus treatments entail the application of colour filter overlays that block such wavelengths.
Irlen Syndrome According to Subjective Responses
Gary Rodney and a growing number of scientists and optometrists do not dispute Irlen Syndrome’s underlying premise or the course of therapy recommended by Irlen diagnosticians. They do, however, raise concerns about whether the diagnoses and treatments are justified and accurate, given that both are solely based on the subjective experiences of those who are experiencing the symptoms and those who are receiving the treatment, respectively, and that neither is supported by objective data.
The Hawthorne Effect, which contends that individuals behave differently when they are aware they are being observed, may impact the legitimacy of the responses and report-backs in certain situations, according to Rodney.
Is Irlen addressing the root of the problem or just the symptoms
“This subjective approach has had a negative impact on the thoroughness of routine optometric eye exams, leading some optometrists to forego tests and screenings that could result in an accurate diagnosis of eye function anomalies that exhibit the same symptoms as Irlen filters and are amenable to eye therapy,” says Rodney, the creator of the Smart Vision method of optometry.
Furthermore, screening revealed that a significant portion of patients who qualified to get the Irlen Syndrome filter therapy had this undiscovered visual aberration, according to two different investigations on the effectiveness of the treatment. According to Taub et al., the percentages were 83%, and the research by Scheiman et al. found that the figures were 95%.
“Just as crucial as the ability to see is the capacity for accurate perception of what you are seeing and effortless visual focus,” says Rodney.
Smart Vision Optometry Eyes InDesign Mosman, provides professional clinical services to best evaluate and treat eye-related queries and visual problems and supports patients to optimise their visual health.
Smart Vision Optometry clinics are located in multiple suburbs in Sydney. Book a Smart Vision Comprehensive Vision Skills Assessment or Advanced Eye Health Test for any child or adult by calling the Mosman clinic (02) 9969 1600 or the Bondi clinic (02) 9365 5047, book an appointment online.
Current evidence and clinical context
RANZCO’s 2025 Irlen-lens statement describes the condition as unproven and identifies limitations in studies of coloured filters. Subjective comfort is not the same as an established improvement in reading.
The original interview’s prevalence figures and criticisms of other examinations are not verified here. Assessment should address symptoms, recognised eye conditions and learning needs without assuming a filter or generic training programme is the solution.
Related Smart Vision reading
Vision and dyslexia · What an eye examination can assess
Frequently asked questions
Does discomfort while reading prove Irlen syndrome?
No. Similar symptoms can occur with recognised eye conditions and other difficulties that need assessment.
Are coloured filters an established way to improve reading?
RANZCO’s 2025 statement says high-quality evidence of reliable reading improvement is lacking.
Should learning support be postponed while trying filters?
No. Appropriate educational assessment and support should continue alongside investigation of visual symptoms.
