Irlen syndrome (or scotopic sensitivity syndrome) is a purported medical condition defined by disordered visual processing. It is proposed that it can be treated by wearing colored lenses. The ideas of Irlen syndrome are not supported by scientific evidence, and psychologists and medical professionals have described its treatment as a health fraud.
History
The condition was proposed in the 1980s, by Helen Irlen, an educational psychologist. Irlen found that certain children and adults who had reading difficulties improved upon overlaying coloured acetate sheets on top of the text that was being read.
The diagnostic test for Irlen Syndrome was developed by Irlen, and consists of a questionnaire of 32 questions, a series of visual tasks, and an assessment where coloured lenses are presented to the patient to see if there is any reading improvement when using them. Irlen has not provided any data related to the diagnostic test or released a comprehensive diagnostic criteria.
The Irlen method uses tinted lenses. The method is intended to reduce visual distortions, eye strain, and fatigue.
Criticism
Some psychologists and medical professionals say that the ideas of Irlen syndrome are pseudoscientific and not supported by scientific evidence. Others say that the treatment of Irlen syndrome is a form of health fraud that takes advantage of vulnerable people.
Medical organisations that don't recognise Irlen Syndrome include the World Health Organization, American Academy of Ophthalmology, and the American Academy of Pediatrics.