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Related Experiment Video

Updated: Feb 23, 2026

Method for the Assessment of Effects of a Range of Wavelengths and Intensities of Red/near-infrared Light Therapy on Oxidative Stress In Vitro
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Light therapy: is it safe for the eyes?

A Brouwer1, H-T Nguyen2, F J Snoek3

  • 1Department of Psychiatry, Amsterdam Public Health research institute, VU University Medical Center and GGZ inGeest, Amsterdam, The Netherlands.

Acta Psychiatrica Scandinavica
|September 12, 2017
PubMed
Summary

Light therapy is generally safe for eyes in healthy individuals, with no evidence of damage found. Further research is needed for those with pre-existing eye conditions or increased photosensitivity.

Keywords:
chronobiologyreview of the literatureseasonal affective disorderside effectstreatment

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Area of Science:

  • Ophthalmology
  • Psychiatry
  • Photobiology

Background:

  • Light therapy is a popular treatment for depression and neuropsychiatric disorders.
  • Concerns exist regarding the potential ocular safety of light therapy.

Purpose of the Study:

  • To systematically review the ocular safety of light therapy.
  • To analyze reported ocular complaints and examinations in light therapy studies.

Main Methods:

  • Systematic review of studies identified via PubMed search.
  • Inclusion of 43 articles reporting ocular complaints and examinations.
  • Analysis of ocular safety data from reviewed literature.

Main Results:

  • Ocular complaints ranged from 0% to 45% across studies, with no clear dose-response relationship.
  • No evidence of ocular damage was found, except for one case of maculopathy with clomipramine.
  • Light therapy appears safe for physically healthy, unmedicated individuals.

Conclusions:

  • Light therapy is considered safe for the eyes in healthy, unmedicated populations.
  • Ocular safety in individuals with pre-existing eye conditions or photosensitivity requires further investigation.
  • Theoretical considerations do not support strict ocular safety contraindications for light therapy.