Table 1. Characteristics of high myopia cases and controls in this study.

Groups	Number	Age (Years)*	Gender		Refractive errors (Diopter, ±)	Axial length (mm)
			Male	Female
Cases	697	34.3 ±11.9	317	380	−9.77 ±3.35 (OD), −9.82 ±3.21 (OS)	27.64 ±1.75 (OD), 27.83 ±1.79 (OS)
Controls	762	54.5 ±9.2	351	411

*The age when the cases and controls were recruited. ±: standard deviation; OD: right eye; OS: left eye; mm: millimeter.