Irlen.wikiAn independent record of the Irlen Institute, the Irlen Method and the evidence about them

FAQ

From Irlen.wiki, an independent record of the Irlen Institute, its colored overlays and filters, and what researchers say

Researched and compiled by the Irlen Wiki editorial team · First published · Revised

In brief: Short, cited answers about the Irlen Institute, its method and the evidence. The questions below link to the full articles.

A note on independence: Irlen.wiki is an independent record compiled from irlen.com, irlensyndrome.org, public records and published research. It is not operated by the Irlen Institute, sells nothing and gives no medical or educational advice. The Institute’s statements are attributed to it and shown beside independent assessments. Sourcing rules: editorial policy.

What is the Irlen Institute?

The organization founded by Helen Irlen in 1983 that assesses people for Irlen Syndrome and supplies colored overlays and tinted Irlen Spectral Filters.[1]

Where is it?

5380 E. Village Road, Long Beach, CA 90808. See location and contact.[2]

What is the phone number?

(562) 496-2550, or toll-free 1-800-55-IRLEN.[2]

What are the hours?

Monday to Friday, 9 am to 5 pm, according to the Google Business Profile.[3]

Who founded it?

Helen L. Irlen. See Helen Irlen.[4]

What is Irlen syndrome?

A proposed visual processing condition, formerly called scotopic sensitivity syndrome. See Irlen syndrome.[5]

Is Irlen syndrome a medical diagnosis?

No. The WHO, AAO and AAP do not recognize it, and the Institute’s FAQ says it is not a medical condition.[6][7]

Do Irlen lenses work?

Professional bodies and a 2019 systematic review say there is no reliable evidence that they improve reading. See scientific assessment.[8][9][10]

Has the method been tested in a controlled trial?

Yes; a 2011 study in Pediatrics found no immediate reading benefit from Irlen overlays.[11]

How does Irlen testing work?

A screening session that selects an overlay, then for some people a tint assessment for glasses or contacts.[12]

How many overlay colors are there?

Ten.[13]

Who can test for Irlen syndrome?

Irlen screeners (first session) and Irlen diagnosticians (both sessions), certified by the Institute.[14]

Are Irlen diagnosticians licensed health professionals?

Not by virtue of Irlen certification.[15]

Does it treat dyslexia?

The Institute says overlays are not a dyslexia treatment by themselves; professional bodies recommend phonics-based instruction.[13][8]

How much do Irlen glasses cost?

The Institute does not publish prices; ABC News reported about A$700 in Australia in 2019, plus frames.[16]

Is there a patent?

Yes, US 4,961,640 (1990), now expired. See the 1990 patent.[17]

What is the Irlen Syndrome Foundation?

A separate 501(c)(3) nonprofit at the same address, formerly the Learning Research Association.[18]

How many countries is Irlen in?

The Institute says more than 44 on one page and 46 on another.[1][19]

What is its Google rating?

4.5 from 24 reviews on 9 November 2026.[3]

Is this the official site?

No. The official site is irlen.com; this is an independent reference.

Further pages

    Citations

    1. ^ a b About the Irlen Institute. Irlen Institute (irlen.com). Retrieved 9 November 2026.
    2. ^ a b Contact. Irlen Institute (irlen.com). Retrieved 9 November 2026.
    3. ^ a b Irlen Institute, Google Maps listing (Business Profile). Google. Retrieved 9 November 2026.
    4. ^ Founder Helen Irlen. Irlen Institute (irlen.com). Retrieved 9 November 2026.
    5. ^ The science. Irlen Institute (irlen.com). Retrieved 9 November 2026.
    6. ^ Irlen syndrome. Wikipedia. Retrieved 9 November 2026.
    7. ^ FAQs. Irlen Institute (irlen.com). Retrieved 9 November 2026.
    8. ^ a b Learning disabilities, dyslexia, and vision. Pediatrics 127(3):e818–56 (2011). Handler SM, Fierson WM et al., via PubMed. Retrieved 9 November 2026.
    9. ^ RANZCO position statement on Irlen lenses (2025). Royal Australian and New Zealand College of Ophthalmologists. Retrieved 9 November 2026.
    10. ^ Irlen syndrome: systematic review and level of evidence analysis. Arq Neuropsiquiatr 77(3):194–207 (2019). Miyasaka JDS et al., via PubMed. Retrieved 9 November 2026.
    11. ^ Irlen colored overlays do not alleviate reading difficulties. Pediatrics 128(4):e932–8 (2011). Ritchie SJ, Della Sala S, McIntosh RD, via PubMed. Retrieved 9 November 2026.
    12. ^ Testing & treatment. Irlen Institute (irlen.com). Retrieved 9 November 2026.
    13. ^ a b Irlen colored overlays. Irlen Institute (irlen.com). Retrieved 9 November 2026.
    14. ^ Find an Irlen testing center. Irlen Institute (irlen.com). Retrieved 9 November 2026.
    15. ^ Meares-Irlen syndrome/visual stress (MISViS), reviewed 25 September 2026. EyeWiki, American Academy of Ophthalmology. Retrieved 9 November 2026.
    16. ^ Irlen syndrome, the condition medical experts say doesn’t exist, promoted to school teachers (26 June 2019). ABC News (Australia). Retrieved 9 November 2026.
    17. ^ US4961640A: Method and apparatus of treatment of symptoms of the Irlen syndrome. Google Patents (U.S. Patent and Trademark Office record). Retrieved 9 November 2026.
    18. ^ Financials. Irlen Syndrome Foundation (irlensyndrome.org). Retrieved 9 November 2026.
    19. ^ The Irlen Institute: home page. Irlen Institute (irlen.com). Retrieved 9 November 2026.