01/26/2026
How do you know it’s time for an Irlen filter re-check? ⤵️
• Recurrence or escalation of visual stress symptoms (e.g. headaches, asthenopia, reading fatigue)
• Reduced efficacy or intolerance of current filters
• Changes in visual acuity or optical prescription.
• Developmental or maturational changes in visual processing
• Hormonal changes (including puberty, pregnancy, menopause)
• Medical or neurological changes (e.g. illness, migraine disorder, concussion, systemic conditions)
• Lifestyle or functional changes (increased screen exposure, altered occupational or academic demands)
• Environmental changes affecting visual load or lighting conditions
• Physical degradation or ageing of filters (fading, damage, discoloration)
• Variable or inconsistent symptom control
• Routine review due to the potential for changes in visual processing over time
Contact your local diagnostician or comment below and we will help you locate someone close to you.