Ogawa Mamoru, Torii Hidemasa, Yotsukura Erisa, Mori Kiwako, Hanyuda Akiko, Matsumura Junko, Fukuoka Kohei, Negishi Kazuno, Kurihara Toshihide, Tsubota Kazuo
Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.
JINS Endowed Research Laboratory for Myopia, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, 160-8582, Tokyo, Japan.
BMC Ophthalmol. 2025 May 20;25(1):300. doi: 10.1186/s12886-025-04128-2.
Outdoor activity is important to prevent myopia progression among schoolchildren, and maintaining the choroidal thickness is important to retard myopia progression. However, no research has reported the effects of short-term intensive outdoor activities on the choroidal thickness. This institution-based prospective observational study aims to assess the impact of outdoor activity for 1 week during a camp program to study ocular parameters including the choroidal thickness.
The intensive outdoor activity program included an average of 6.15 ± 2.98 h of daily time spent outdoors during the camp on subsequent days for 1 week at a low-altitude mountain camp. Twenty-four children participated in this program.
The main outcome was the change in the choroidal thickness compared with baseline. The data were measured at the beginning and end of the program over the course of 1 week and the changes analyzed. The mean age of the participants (50% female) was 11.5 ± 0.5 (standard deviation) years, and the mean changes were as follows: the refractive error became more positive, the axial length decreased, and the choroidal thickness (µm) increased, respectively, by 0.21 ± 1.35 diopters (P = 0.742), -0.01 ± 0.02 mm (P = 0.241), and 30.7 ± 20.3 μm (P < 0.001).
The results suggested that intensive outdoor activity for only 1 week increased the choroidal thickness in Japanese schoolchildren.
户外活动对于预防学龄儿童近视进展很重要，维持脉络膜厚度对于延缓近视进展很重要。然而，尚无研究报道短期高强度户外活动对脉络膜厚度的影响。这项基于机构的前瞻性观察性研究旨在评估在一个营地项目中进行1周户外活动对包括脉络膜厚度在内的眼部参数的影响。
高强度户外活动项目包括在一个低海拔山区营地进行为期1周的营地活动，后续几天平均每天在户外度过6.15±2.98小时。24名儿童参与了该项目。
主要结果是与基线相比脉络膜厚度的变化。在项目开始和结束时的1周内测量数据并分析变化情况。参与者的平均年龄（50%为女性）为11.5±0.5（标准差）岁，平均变化如下：屈光不正变得更正向，眼轴长度减少，脉络膜厚度（μm）分别增加0.21±1.35屈光度（P = 0.742）、-0.01±0.02毫米（P = 0.241）和30.7±20.3μm（P < 0.001）。
结果表明，仅进行1周的高强度户外活动就能增加日本学龄儿童的脉络膜厚度。
