Table 1 Demographic data according to three-dimensional eyeball shape.

From: Association between eyeball asymmetry and offset of openings in optic nerve head canal assessed by posterior polar eyeball topography

 

Group 1

Without asymmetry

(N = 91)

Group 2

With asymmetry

(N = 79)

P

Age, years

53.1 ± 16.0

57.2 ± 16.3

0.106*

Sex (Male / Female)

49 / 42

37 / 42

0.362†

Axial length, mm

25.5 ± 2.1

25.8 ± 1.6

0.365*

IOP, mmHg

15.2 ± 3.1

15.5 ± 5.2

0.692*

BMO area, mm2

3.31 ± 2.04

3.23 ± 1.55

0.765*

Angular deviation of LC/BMO offset, °

10.3 ± 74.3

61.4 ± 55.1

< 0.001*

Angular deviation of β-zone PPA, °

-0.4 ± 68.3

-6.4 ± 73.4

0.647*

Offset index

0.54 ± 0.29

0.68 ± 0.28

0.002*

RMSE of ellipsoid fitting

0.017 ± 0.005

0.025 ± 0.010

 < 0.001*

Number of patients with glaucoma

69 (76%)

53 (67%)

0.207†

  1. IOP Intraocular pressure, BMO Bruch’s membrane opening, LC Lamina cribrosa, PPA Parapapillary atrophy, RMSE Root mean square error.
  2. *Comparison performed using independent-t test.
  3. †Comparison performed using Chi-square test.
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