Effect of FFP2/N95 facemask wear on retinal and choroidal thickness profile in healthy subjects

Creative Commons License

Gunay B. O., Akalin I., Kalkisim A., Esenulku C. M., TÜRKOĞLU ŞEN E. B.

International Journal of Ophthalmology, vol.15, no.11, pp.1821-1828, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 15 Issue: 11
  • Publication Date: 2022
  • Doi Number: 10.18240/ijo.2022.11.13
  • Journal Name: International Journal of Ophthalmology
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Directory of Open Access Journals
  • Page Numbers: pp.1821-1828
  • Keywords: choroid, FFP2/N95 facemask, ganglion cell layer, retina, retinal nerve fiber layer, thickness
  • Akdeniz University Affiliated: Yes


© 2022 International Journal of Ophthalmology (c/o Editorial Office). All rights reserved.AIM: To investigate the influence of non-oil 95 (N95)/filtering facepiece 2 (FFP2) facemask wear on retinal thickness, choroidal thickness (CT), retinal nerve fiber layer thickness (RNFLT), and ganglion cell layer thickness (GCLT) in healthy subjects. METHODS: In this prospective study, 53 healthy participants who used FFP2/N95 facemask were enrolled. Participants underwent optical coherence tomography imaging before and at 1 and 4h following FFP2/N95 facemask wear. The last imaging session was performed 1h after FFP2/N95 removal. Retinal thickness, CT, RNFLT, and GCLT were assessed at each session. Vital parameters were also assessed. RESULTS: The pulse rate of the subjects significantly decreased at 1 and 4h compared to baseline values (P<0.05). No significant changes in retinal thickness, RNFLT, and GCLT were observed in the study. CT profile showed a significant increase at all measured locations except 1-mm temporal, 1-mm inferior and 2-mm inferior points following FFP2/N95 wear which turned to baseline values after FFP2/N95 removal. Pulse rate and CT changes at 4h were significantly correlated (P<0.05). CONCLUSION: Parasympathetic activation during FFP2/N95 facemask wear might have a role on elevated CT measurements in healthy individuals by virtue of increased choroidal blood flow.