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Irlen lenses do not improve accommodative accuracy at near
K J Ciuffreda1, M Scheiman, E Ong
1SUNY State College of Optometry, Department of Vision Sciences, New York, USA.
Summary
Irlen lenses did not improve steady-state accommodation in successful users. This study found no significant difference in accommodation levels with or without filtered lenses, suggesting Irlen correction offers no near visual benefit.
Area of Science:
- Ophthalmology
- Optometry
- Visual Science
Background:
- Near accommodative dysfunction is a potential factor in patients using Irlen lenses.
- Irlen lenses are spectrally broad-band filtered lenses.
- Successful Irlen users were studied to assess visual function.
Purpose of the Study:
- To determine the influence of Irlen lenses on steady-state accommodation.
- To investigate if Irlen lenses impact near accommodative function in successful users.
- To assess accommodative response with and without filtered lenses.
Main Methods:
- Monocular steady-state accommodation was measured in six successful Irlen patients.
- Accommodation was assessed using near blur stimuli (2, 3, and 4 D).
- Measurements were taken with nonfiltered and filtered spectacle corrections using a Hartinger coincidence optometer.
Main Results:
- No significant difference in the mean level of accommodation was found between filtered and nonfiltered conditions.
- A small but significant increase in accommodative variability was observed with filtered Irlen lenses.
- Irlen correction did not positively affect monocular steady-state accommodation at near.
Conclusions:
- Irlen lenses do not enhance or improve near steady-state accommodation in successful users.
- The study suggests that Irlen lenses do not alleviate potential near accommodative dysfunction.
- Further research may be needed to explore other visual aspects potentially influenced by Irlen lenses.