Coloured or Irlen lenses for reading difficulties

15 mins
The first step in the evidence-based practice process is the formulation of an answerable clinical question. This involves identifying terms that can be used in a search for information (evidence) that will help to answer the question. The acronym “PICO” is widely used as a framework to help clinicians identify those search terms. PICO stands for:

P: Patient, Population or Problem. This is a term that identifies the type of patient and/or the condition or problem of interest.

I: Intervention. This term describes the intervention or treatment of interest.

C: Comparison; indicating any state with which the intervention of interest is compared, e.g. a placebo.

O: Outcome; the outcome measure.

The PICO acronym works well for many clinical scenarios in which we are considering intervention or treatment of a condition. However, not all of these terms apply when we are considering scenarios in which we are interested in; diagnosis, prognosis or prevalence, for example.

For the clinical scenario described below, the focus is on treatment so a traditional treatment PICO is used.

You have been referred a 12 year old female who is having trouble reading at school for assessment, diagnosis and management. The child is also seeing a psychologist, speech pathologist and educational tutor regarding her learning. Her mother heard about coloured lenses and overlays in the media and wants to see whether these strategies could be beneficial for her daughter's reading.

Body Tabs

Resource contributed by: Elizabeth Murray, Isabelle Jalbert, Rachel Thompson and Catherine Suttle
Affiliation: EBP Optometry, UNSW

Module 1
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