Table 2.

Key results and myopia progression from previous studies

Reference	Location	Age, y	Sample size	Duration, months	Average myopia, D	Myopia progression, D
Donovan L et al., 2012[22]	China	6–12	85	6	NA	− 0.31 ± 0.25 for summer  − 0.53 ± 0.29 for winter
Fujiwara M et al., 2012[24]	Japan	10–13	92	6	− 4.40 ± 1.38	− 0.35 ± 0.04 for summer  − 0.28 ± 0.06 for winter
Cui D et al., 2013[32]	Denmark	8–14	235	6	− 2.24 ± 1.39	− 0.287 ± 0.266
Jane G et al., 2014[26]	USA	6–12	469	6	− 2.54 ± 0.84	− 0.35 ± 0.34 for winter  − 0.14 ± 0.32 for summer
Yu S et al., 2015[29]	China	6–15	900	6	NA	− 0.56 ± 0.37
Clark et al., 2015[27]	USA	6–15	NA	12	− 2.0 ± 1.5	− 0.6 ± 0.4
Yam et al., 2018[30]	Hong Kong	4–12	109	12	− 3.85 ± 1.95	− 0.81 ± 0.53
Pei w, et al., 2018[31]	Taiwan	6–7	41	12	NA	− 0.79 ± 0.38
Sacchi et al., 2019[25]	Italy	5–16	50	12	− 2.63 ± 2.68	− 1.09 ± 0.64
Larkin et al., 2019[28]	USA	6–15	98	12	− 2.8 ± 1.6	− 0.6 ± 0.4
Yun c et al., 2020[23]	China	8–15	144	12	− 3.16 ± 1.13	− 0.61 ± 0.31