Assessment of the Association between In Vivo Corneal Morphogeometrical Changes and Keratoconus Eyes with Severe Visual Limitation

Table 2

Descriptive values and differences in the modelled morpho-biometric indices among the normal and severe KC groups.

Morpho-biometric indices	Normal group (n = 50)				Severe KC group (n = 30)
	Mean	SD	Min	Max	Mean	SD	Min	Max	z
Voltot (mm³)	25.72	1.53	23.23	29.07	23.74	1.85	20.17	28.40	5.18	≤0.01
Corareaant (mm^2)	43.08	0.14	42.77	43.33	43.80	0.59	42.66	45.11	−6.56	≤0.01
Corareapos (mm^2)	44.24	0.26	43.53	44.71	45.44	0.95	43.78	47.97	−6.78	≤0.01
Corareatot (mm^2)	103.89	1.12	100.73	105.66	105.20	2.13	102.35	112.68	−3.14	≤0.01
Splareapapex (mm^2)	4.32	0.26	3.93	4.87	3.86	0.40	2.96	5.02	6.33	≤0.01
Splareaminthk (mm^2)	4.31	0.26	3.92	4.86	3.84	0.40	2.97	5.03	6.41	≤0.01
Devaapex (mm)	0.00	0.00	0.00	0.00	0.03	0.02	0.00	0.06	−8.26	≤0.01
Devpapex (mm)	0.07	0.02	0.04	0.09	0.26	0.12	0.05	0.59	−6.68	≤0.01
COMX (mm)	0.04	0.02	0.01	0.09	−0.01	0.06	−0.20	0.12	4.23	≤0.01
COMY (mm)	0.03	0.02	0.00	0.08	−0.01	0.09	−0.13	0.33	2.57	0.02
COMZ (mm)	0.77	0.02	0.71	0.81	0.85	0.08	0.70	1.06	−5.56	≤0.01
Devaminthk (mm)	0.83	0.21	0.44	1.27	0.91	0.36	0.16	1.68	−1.12	0.27
Devpminthk (mm)	0.76	0.20	0.38	1.24	0.85	0.34	0.10	1.60	−1.23	0.23

SD: standard deviation; P: statistical test; z: z-score.