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.