Trial reportFrontiers in public health2026
Short-term effects of distant-image screen and myopic defocus on choroidal thickness in children: a randomized pilot clinical trial.
Trial report in Frontiers in public health, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Purpose: This study aimed to characterize the changes in choroidal thickness (ChT) in response to optical approaches using the distant-image screen (DIS) device and defocus-incorporated multiple segments (DIMS) lenses. Design: This is a prospective, randomized, controlled, crossover trial. Participants: A total of 40 children (8-13 years of age) with spherical equivalent refraction (SER) ranging from -0.50 to -6.00 diopters (D) were recruited and randomized into 4 groups: children who watched videos using either a DIS or a tablet computer (TC) and those wearing DIMS or single-vision lenses (SVL). Methods: In their assigned groups, children watched videos for 90 min in stage I, followed by a 3-7-day recovery period. After this recovery period, the children in the TC group were crossed over to the DIS group, and those in the DIS group were crossed over to the TC group for an additional 90 min in stage II. The SER was measured before and after watching videos using an open-field autorefractor. The ChT in the central (1 × 1 mm), superior, inferior, nasal, and temporal regions in 1-3 mm (S3, I3, N3, and T3) and 3-6 mm (S6, I6, N6, and T6) were measured before and after watching videos using full-range swept-source optical coherence tomography (SS-OCT). Main outcome measures: The main outcome measure was the changes in regional ChT. Results: After 90 min of video watching, the SER in the TC group significantly increased after viewing 90-min videos (-2.14 ± 1.15 D vs.-2.26 ± 1.16 D, Conclusion: Short-term long-distance working mode and myopic defocus may exert beneficial effects on choroidal variation in myopic children. Clinical Trial Registration Number: https://www.chictr.org.cn/showproj.html?proj=184978, Identifier ChiCTR2200065741.
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