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Table 2 Baseline Characteristics and Treatment Parameters of 66 OK subjects

From: Effect of Orthokeratology on myopia progression: twelve-year results of a retrospective cohort study

Variable

n(%) or mean ± S.E.

Number of eyes

131

Gender

 Male

61(46.6%)

 Female

70 (53.4%)

Age

11.65 ± 0.24

  < =10 years-old

39 (29.8%)

  > 10 years-old

92 (70.2%)

Ocular sphere refraction (D)

−3.82 ± 0.14

  < −5D

91 (69.5%)

  > = − 5D

40 (30.5%)

Ocular cylinder refraction (D)

−0.56 ± 0.07

  < −1.5D

117 (89.3%)

  > =1.5D

14 (10.7%)

M

−3.54 ± 0.14

J0

−0.26 ± 0.03

J45

−0.03 ± 0.01

Keratometry value (D)

43.64 ± 0.11

Follow-up time (years)

6.20 ± 0.21

Regular lens replacement

 No

23 (17.6%)

 Yes

108 (82.4%)

  1. Data are presented as n(%) or mean ± standard error of the mean
  2. D, diopters; M, the spherical equivalent; J0, the astigmatism power vector associated with a horizontally oriented axis; J45, the astigmatism power vector associated with an obliquely oriented axis in the 45° meridian