Grading of Recommendations, Assessment, and Evaluation (GRADE) ranking for evidence of two outcomes.

1 Axial length (follow-up mean 2 years; better indicated by lower values).2 Vitreous chamber length (follow-up mean 2 years; better indicated by lower values).3 Most of studies did not use blinding method.Grading of Recommendations, Assessment, and Evaluation (GRADE) ranking for evidence of two outcomes.1. 眼轴长度（Axial length）：平均随访时长为2年；数值越低则指标表现越佳。 2. 玻璃体腔长度（Vitreous chamber length）：平均随访时长为2年；数值越低则指标表现越佳。 3. 多数研究未采用盲法。 针对两项结局证据的推荐分级、评估、制定与评价（Grading of Recommendations, Assessment, and Evaluation，GRADE）等级评定。