Effect of short-wavelength light on subfoveal choroidal thickness with induced hyperopic defocus in young adult emmetropes Artykuł oryginalny

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Opublikowane: paź 6, 2026
DOI: https://doi.org/10.24292/01.OT.241926
Słowa kluczowe:
hyperopic defocus, subfoveal choroidal thickness, shorter wavelength

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Zahra Batool
Outpatient Department, Al-Shifa Trust Eye Hospital, Rawalpindi
Saif Ullah
Optometry Department, Pakistan Institute of Ophthalmology, Al-Shifa Trust Eye Hospital, Rawalpindi
http://orcid.org/0000-0003-3254-5585
Amtul Aziz
Diagnostic Department, Al-Shifa Trust Eye Hospital, Rawalpindi
Fatima Yousaf
Diagnostic Department, Al-Shifa Trust Eye Hospital, Rawalpindi
Mehmona Asgher
Optometry Department, Pakistan Institute of Ophthalmology, Al-Shifa Trust Eye Hospital, Rawalpindi
http://orcid.org/0000-0003-1265-1137
Muqadas Shahzadi
Cornea Department, Al-Shifa Trust Eye Hospital, Rawalpindi

Abstrakt

Purpose: This study aimed to investigate the effect of short term exposure to shorter wavelengths and induced hyperopic defocus on subfoveal choroidal thickness (SFCT).
Materials and methods: A pre- and post-quasi experimental study was conducted in the diagnostic department of a tertiary eye care hospital using judgmental sampling technique. Visual acuity and refractive status were measured using logMAR and a Retinoscope. Dual exposure included 405 nm laser for 60, 120, and 180 s, and an android phone in blue mode for 2 h with hyperopic defocus. Subfoveal choroidal thickness was measured with OPTOVUE AVANTI spectral domain-optical coherence tomography (SD-OCT). Data entry and analysis were done with JAMOVI.
Results: The study included 30 subjects with a mean age of 20.67 (±0.96) years, ranging from 19 to 23 years. In terms of SFCT measurements before and after defocus at various intervals of blue light exposure, significant changes were observed. The mean pre-defocus subfoveal choroidal thickness (PDSFCT) was 298.23 (±45.44) μm, increasing to 320.53 (±51.89) μm after defocus (ADSFCT). This change was statistically significant, as indicated by a paired sample t-test (t = -4.805, p <0.001) after 2 h of android phone in full blue mode with hyperopic defocus. Similarly, significant differences were noted at 60 sec. (t = -3.796, p <0.001), 120 s (t = -2.013, p = 0.027), and 180 s (t = -2.028, p = 0.026) of blue light exposure.
Conclusion: Exposure to shorter wavelengths induces an increase in subfoveal choroidal thickness that is independent of defocus.

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Batool Z, Ullah S, Aziz A, Yousaf F, Asgher M, Shahzadi M. Effect of short-wavelength light on subfoveal choroidal thickness with induced hyperopic defocus in young adult emmetropes. Ophthatherapy [Internet]. 6 październik 2026 [cytowane 23 październik 2026];00:A241926. Dostępne na: https://www.journalsmededu.pl/index.php/ophthatherapy/article/view/3409
Numer
Ahead of print
Dział
Diagnostyka
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Utwór dostępny jest na licencji Creative Commons Uznanie autorstwa – Użycie niekomercyjne – Bez utworów zależnych 4.0 Międzynarodowe.

Copyright: Medical Education sp. z o.o. License allowing third parties to copy and redistribute the material in any medium or format and to remix, transform, and build upon the material, provided the original work is properly cited and states its license.

Address reprint requests to: Medical Education, Marcin Kuźma (marcin.kuzma@mededu.pl)

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