| |
SP
|
S(r&R)
|
r&R
|
TV
|
RU
|
|---|
|
Anterior
|
|
K1 (D)
|
4.14
|
0.10
|
0.28
|
4.14
|
1.00
|
|
K2 (D)
|
3.11
|
0.19
|
0.53
|
3.11
|
0.99
|
|
Km (D)
|
3.66
|
0.19
|
0.53
|
3.66
|
0.99
|
|
Astigmatism (D)
|
1.02
|
0.16
|
0.46
|
1.04
|
0.91
|
|
Q-value, 30 deg
|
0.83
|
0.08
|
0.24
|
0.84
|
0.98
|
|
Rper (mm)
|
0.07
|
0.04
|
0.10
|
0.08
|
0.76
|
|
Rmin (mm)
|
0.52
|
0.11
|
0.32
|
0.53
|
0.90
|
|
Posterior
|
|
K1 (D)
|
1.06
|
0.09
|
0.24
|
1.07
|
0.99
|
|
K2 (D)
|
0.78
|
0.14
|
0.39
|
0.79
|
0.94
|
|
Km (D)
|
0.96
|
0.06
|
0.18
|
0.96
|
0.99
|
|
Astigmatism (D)
|
0.24
|
0.09
|
0.25
|
0.26
|
0.68
|
|
Q-value, 30 deg
|
0.82
|
0.19
|
0.54
|
0.84
|
0.85
|
|
Rper (mm)
|
0.42
|
0.06
|
0.18
|
0.42
|
0.97
|
|
Rmin (mm)
|
0.48
|
0.09
|
0.26
|
0.49
|
0.92
|
|
Summary data
|
|
Kmax front (D)
|
4.56
|
1.09
|
3.03
|
4.69
|
0.88
|
|
Corneal volume (mm3)
|
4.39
|
1.34
|
3.72
|
4.59
|
0.79
|
|
KPD (D)
|
0.47
|
0.15
|
0.41
|
0.49
|
0.83
|
|
AC volume (mm3)
|
48.84
|
14.65
|
40.60
|
50.99
|
0.92
|
|
AC angle (deg)
|
15.47
|
4.91
|
13.60
|
16.23
|
0.80
|
|
AC depth (mm)
|
0.72
|
0.04
|
0.12
|
0.72
|
1.00
|
|
Pupil diameter (mm)
|
0.46
|
0.18
|
0.51
|
0.49
|
0.84
|
|
Pachymetry
|
|
Pupil centre (μm)
|
28.20
|
11.00
|
30.49
|
30.27
|
0.72
|
|
Apex (μm)
|
13.76
|
11.54
|
31.98
|
17.96
|
0.42
|
|
Thinnest (μm)
|
10.28
|
9.84
|
27.28
|
14.24
|
0.36
|
|
Corneal volume (mm3)
|
|
3 mm diameter
|
0.05
|
0.06
|
0.17
|
0.08
|
0.34
|
|
5 mm diameter
|
0.14
|
0.14
|
0.40
|
0.20
|
0.35
|
|
7 mm diameter
|
0.85
|
0.44
|
1.23
|
0.96
|
0.59
|
|
Indices
|
|
ISV
|
42.03
|
3.12
|
8.64
|
42.15
|
1.00
|
|
IVA
|
0.68
|
0.05
|
0.14
|
0.68
|
0.98
|
|
KI
|
0.13
|
0.03
|
0.09
|
0.14
|
0.85
|
|
CKI
|
0.05
|
0.01
|
0.03
|
0.05
|
0.96
|
|
IHA
|
17.95
|
18.40
|
51.01
|
25.71
|
0.39
|
|
IHD
|
0.04
|
0.00
|
0.00
|
0.04
|
0.96
|
|
Elevation map
|
|
Front at TCT (μm)
|
18.33
|
4.82
|
13.36
|
18.95
|
0.85
|
|
Back at TCT (μm)
|
55.01
|
4.64
|
12.85
|
55.21
|
0.99
|
|
Ectasia map
|
|
Df
|
6.41
|
2.30
|
6.38
|
6.81
|
0.75
|
|
Db
|
5.57
|
0.77
|
2.14
|
5.62
|
0.99
|
|
Dp
|
2.94
|
1.45
|
4.01
|
3.28
|
0.60
|
|
Dt
|
0.12
|
0.13
|
0.37
|
0.18
|
0.39
|
|
Da
|
0.10
|
0.18
|
0.51
|
0.21
|
0.21
|
|
D
|
4.13
|
0.46
|
1.28
|
4.16
|
0.99
|
-
K1, K2 = Keratometry readings 1,2; Km = Mean keratometry reading; Rper = Mean radius of curvature in the 7-9 mm area of the cornea; Rmin = Minimum radius of curvature; KPD = Keratometric power deviation; AC = Anterior chamber; ISV = Index of surface variance; IVA = Index of vertical asymmetry; KI = Keratoconus index; CKI = Centre keratoconus index; IHA = Index of height asymmetry; IHD = Index of height decentration; SR = Between observer standard deviation; R = The limits of reproducibility; TR = The log of the ratio between the limits of reproducibility of keratoconus patients and normal subjects; SP = Between patient standard deviation; S(r&R)
\( =\sqrt{Sr^2+{SR}^2} \); TV = Total variation \( =\sqrt{SP^2+{Sr}^2+{SR}^2} \); Df = Deviation of the front elevation map; Db = Deviation of the back elevation map; Dp = Deviation of average pachymetric progression; Dt = Deviation of the minimum thickness; Da = Deviation of the apex thickness; D = Belin/Ambrosio ectasia total deviation value
- Example of reading the table: Kmax front has an SP value of 4.56 D, which represents the average between patient variability in this parameter; S(r&R) represents the combined limits of repeatability and reproducibility: 1.03 D, TV of 4.78 D represents the total in Kmax variability due to repeatability, reproducibility and between-patient variability. The associated RU value of 0.88 indicates that this parameter has considerable noise with respect to the range of the dynamic range
