What is LLLT (low level light therapy)?

Dry eyes can be more than just a minor inconvenience; they can significantly affect your quality of life. From discomfort and irritation to blurred vision, the symptoms can be quite disruptive. While traditional treatments often include eye drops and lifestyle changes, a promising alternative is gaining attention: red light therapy or low light therapy (LLLT).

How does it work?

Red light therapy (RLT) utilizes low-level wavelengths of red light to stimulate cellular repair and promote healing (1). Originally used in medical settings for wound healing and skin rejuvenation, LLLT has recently gained traction for its potential benefits in treating various health conditions, including dry eyes (1). The red light’s stimulating effect rejuvenates meibomian glands in the eyelids (1). These gland secretions coat the tears, making them last longer, effectively moisturizing the eye. LLLT has also been shown to have anti-inflammatory properties, thereby decreasing inflammation of the eyes that could lead to dryness (1).

Efficacy?

Studies have shown that 6 treatments of LLLT over a 3 week period lead to significantly decreased erosion on the ocular surface at the 1 month mark (2). As well, there were noted improvements in tear stability, reduced eyelid swelling, normal oil secretion from the meibomian glands, and symptom reduction (2).

Side effects?

The side effects are fairly minimal for LLLT. Most reported side effects consist of temporary light sensitivity and mild discomfort immediately following the procedure (1-2).

Conclusion

To conclude, with its well-tolerated profile and improvement across all measured dry eye categories, LLLT is an excellent option for those who would prefer an alternative method to the traditional drop approach to treating dry eyes.

Citations:

1. professional, C. C. medical. (2024, October 2). Red light therapy: Benefits, Side Effects & Uses. Cleveland Clinic. https://my.clevelandclinic.org/health/articles/22114-red-light-therapy

Park, Y., Kim, H., Kim, S., & Cho, K. J. (2022). Effect of low-level light therapy in patients with Dry Eye: A prospective, randomized, observer-masked trial. Scientific Reports, 12(1). https://doi.org/10.1038/s41598-022-07427-6

Written by Midwestern Intern, Vinay Naidoo

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