Phakic Posterior Chamber Intraocular Lens with a Central Hole in Treating Patients with Moderate to High Myopia: A Meta-Analysis

Table 1

Basic characteristics of the included literature.

Studies (author, year)	Country	Number		Age		Follow-up	Pre-SE		Pre-UDVA
		Experimental group	Control group	Experimental group	Control group		Experimental group	Control group	Experimental group	Control group
Tang and Liao, 2017 [14]	China	75	36	26.11 ± 7.41	21.31 ± 3.58	3M	−12.78 ± 4.92	−9.99 ± 3.10	NA	NA
Li et al., 2017 [18]	China	20	21	21–43	20–41	6 M	−9.57 ± 3.12	−9.92 ± 2.54	NA	NA
Liang et al., 2016 [19]	China	24	48	18–40	20–44	1 M	NA	NA	0.07 ± 0.34	0.08 ± 0.03
Shimizu et al., 2016 [17]	Japan	14	18	31.2 ± 7.6	31.2 ± 7.6	5 Y	−7.54 ± 2.40	−7.51 ± 2.42	1.35 ± 0.23	1.34 ± 0.23
Chen et al., 2016 [16]	China	22	22	26.5 ± 5.8	26.5 ± 5.8	6 M	−9.43 ± 5.01	−9.94 ± 4.88	1.34 ± 0.22	1.35 ± 0.23

Note: SE : spherical equivalent; UDVA : uncorrected distance visual acuity; M : month; Y : year; NA: data not available.