Analysis of Choroidal Vascularity Index in Keratoconus Patients Using Swept-Source Optical Coherence Tomography-Based Binarization Techniques
Table 2
Topographic characteristics of keratoconus patients.
Age group (n)
TKC
Minimum pachymetry
Posterior elevation
K mean
K max
Axial length
0 to <20 (10)
1.8 (1.3)
484.7 (39.0)
40.8 (32.6)
47.29 (3.61)
54.94 (8.53)
23.77 (1.03)
20 to <40 (59)
2.0 (1.0)
447.9 (69.3)
50.7 (27.8)
48.02 (5.23)
54.39 (6.61)
23.81 (1.16)
40 to <60 (23)
2.0 (1.0)
476.1 (58.8)
46.5 (30.2)
47.66 (5.77)
53.89 (8.31)
24.49 (1.06)
≥60 (5)
2.1 (1.7)
490.8 (138.5)
79.8 (68.1)
52.28 (9.04)
61.68 (18.28)
25.47 (0.42)
Overall (97)
2.0 (1.0)
460.3 (68.8)
50.2 (32.1)
48.08 (5.46)
54.71 (8.11)
24.06 (1.17)
Topographic characteristics of patients with keratoconus by age group (in years). Measures represent mean (standard deviation). Minimum pachymetry and posterior elevation in microns, K mean and K max in diopters; axial length in millimeters. TKC: topographic keratoconus classification.