Table 1.

Data obtained for the three groups of eyes.

Normal eyes
Variable	Mean	SD	Median	Range
SN − IT	17.39	12.92	17	−24 to 54
Min	531.7	30.17	532	454 to 592
Min − Med	−20.50	5.06	−20	−47 to −8
S − I	8.519	12.70	9	−40 to 48
Y location	−155.9	398.43	−141	−137 to 607
Min − Max	−53.42	11.81	−52	−97 to −26
CCT	537.6	30.66	538	459 to 598
Sup	52.03	3.27	52	37 to 60
Inf_ep	53.38	3.10	53	46 to 62
Min_ep	49.52	3.73	50	33 to 57
Max	56	3.55	56	48 to 69
Min − Max_ep	−6.423	3.04	−6	−25 to −2
SD	1.549	0.75	1.40	0.6 to 4.9
CET	52.90	3.09	53	42 to 61
Fellow eyes
Variable	Mean	SD	Median	Range
SN − IT	24.50	20.05	20	−1 to 68
Min	503.2	32.71	499.5	447 to 597
Min − Med	−22.36	9.42	−20.5	−48 to −13
S − I	15.950	17.35	15	−19 to 48
Y location	−558.6	591.70	−610	−1809 to 513
Min − Max	−57.50	18.80	−52.5	−103 to −37
CCT	513.1	31.90	512.5	453 to 605
Sup	53.27	4.25	52	48 to 67
Inf_ep	53.14	4.50	52.5	47 to 70
Min_ep	49.09	4.74	49	37 to 64
Max	56.86	4.52	56.5	52 to 73
Min − Max_ep	−7.818	3.89	−6	−20 to −3
SD	1.891	0.99	1.50	0.7 to 4.7
CET	52	4.07	53.23	49 to 68
Keratoconic eyes
Variable	Mean	SD	Median	Range
SN − IT	56.95	28.49	55	12 to 114
Min	458.0	45.14	451.5	380 to 589
Min − Med	−54.27	23.72	−51	−101 to −14
S − I	44.770	35.25	41	−38 to 115
Y location	−947.5	549.53	−834	−2369 to −206
Min − Max	−114.60	51.96	−99	−227 to −44
CCT	482.9	30.62	479	416 to 536
Sup	55.55	6.36	55	40 to 67
Inf_ep	50.82	5.86	49.5	41 to 64
Min_ep	41.18	6.45	42	33 to 56
Max	63.36	8.45	62	47 to 80
Min − Max_ep	−22.090	10.80	−20	−44 to −7
SD	5.918	3.19	5.55	1.7 to 13.8
CET	48.59	5.71	47.5	39 to 61