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Table 5 “Corneal biometry, anterior chamber and axial length stratified by refractive error-all subjects”

From: Biometry and visual function of a healthy cohort in Leipzig, Germany

  

CC R1 ant

CC R2 ant

CC R1 post

CC R2 post

CCT

ACD

ACV

AL

Manifest myopia (< −2D)

mean

7.77

7.55

6.57

6.16

552.81

3.11

185.59

25.07

 

SD

0.26

0.33

0.36

0.25

34.05

0.24

27.69

1.12

Low myopia (−2D ≤ −0.5D)

mean

7.89

7.73

6.65

6.33

549.02

3.04

179.31

24.20

 

SD

0.23

0.25

0.24

0.26

31.35

0.33

35.30

0.90

Emmetropia (−0.5D ≤ ≥ +0.5D)

mean

7.91

7.74

6.64

6.27

554.13

2.83

159.18

23.54

 

SD

0.26

0.25

0.25

0.24

34.07

0.32

35.05

0.72

Low hypermetropia (+0.5D ≥ +2D)

mean

8.01

7.84

6.71

6.38

556.86

2.54

135.06

23.41

 

SD

0.28

0.28

0.27

0.28

32.38

0.28

35.11

0.79

Manifest hypermetropia (> +2D)

mean

7.90

7.74

6.71

6.32

559.94

2.34

109.76

22.51

 

SD

0.30

0.28

0.29

0.27

29.54

0.29

24.78

0.74

  1. Caption: Data stratified by refractive state based on sphere of subjective best corrected vision (mean ± standard deviation). Anterior radii of the cornea (flat: R1 ant, steep: R2 ant) and posterior radii of the cornea (flat: R1 post, steep:R2 post) presented with the following relationship compared for myopic and hyperopic groups: for manifest myopia, the flattest anterior radius (R1) was steeper compared to manifest hypermetropia, the steep counterpart (R2 ant) again was steepest for the myopic group. The corresponding posterior radius presented with a similar change in steepness (again R1 post and R2 post being steepest for myopes). The difference for all four radius parameters was ~0.2 from manifest myopia to manifest hyperopia, reflecting the appearance of a minus lens of the cornea within the optics of the eye. The difference between R1 ant and R2 ant was about 0.2 mm within each refractive category, i.e. for manifest myopia to manifest hyperopia, between R1 post and R2 post this difference for each refractive category was ~ 0.4 mm. Central corneal thickness (CCT) was similar for manifest myopia and manifest hyperopia groups. Anterior chamber depth (ACD) and – volume (ACV) was smaller in hypermetropic subjects. Axial length (AL) was shortest for subjects with manifest hypermetropia. See Tables 6 and 7 for stratification based on gender