A
Aberration 117f
analysis of 131
coma-like 120
compensation, internal 120
constant 122
fourth order 129
measurement of 118
residual higher-order 137
third order 129
types of 118
with age, changes of 120
Achromatic axis 3
Angulated patterns 46
Arcuate incision 224f
Astigmatic aberration 129
Astigmatic cornea, normal high 210f
Astigmatic disparity, probabilities of 110t
Astigmatic lower-order aberration 130f
axis of 13
bioblique 226
classifications of 91
clinical manifest 108
compound 91
etiology of irregular 93
evaluation of irregular 100
mixed 92
posterior surface 149
simple 91
topographic 110
unusual manifest 100
Asymmetric patterns 45
C
Central flat island 96f
Central steep island 96f
Chamber angle, anterior 35
Chamber volume, anterior 35
Circular pattern 67f
Clown face 49f
Color map appearance 13
Cone 10
Conventional camera, imaging in 11f
apparently normal 176
back, posterior surface 34
Fourier analysis of normal 140f
front, anterior surface 33
Guttata and Fuchs’ dystrophy 225
hyperprolate 84
infracentral 226
high-astigmatic 211
thin 169f
optical center of 209
peripheral 220
prolate 84
shape of 131
thickness spatial profile 183
unclassified abnormal 176
volume 35
with abnormal elevation maps 64f
with normal elevation maps 63f
with suspicious posterior elevation map 65f
Corneal aberrometry in cataract surgery 223
Corneal and pupillary level 119
Corneal apex 6
affects 83
in emmetropia 83
in hypermetropia 84
in myopia 84
on curvature maps 84
on elevation maps 84
on refraction, effect of 83
on vision, effect of 83
Corneal changes with age 120
Corneal coma 137
Corneal cross-linking 181
Corneal dimensions 4
Corneal flattening, postoperative 226
Corneal induced irregular astigmatism 94
Corneal irregular astigmatism, nonectatic 94
Corneal maps and profiles 31
Corneal optics and geometry 3
Corneal pathologies 149
Corneal refraction, understanding 89
Corneal sphere 137
Corneal topography 102
Corneal trauma 98
Corneal warpage 143
Corneal zones 5
Crab claw 48f
Curvature
based devices (topographers) 8
based topography, limitations of 10
color scales for 20f
minimum radius of 179
Cycloplegic refraction 107
D
Decentered ablated zone 95f
Decentration 137
Dioptric power, spherocylindric 103
Discrete pattern 202f
Duochrome test 113
E
Ectatic corneal irregular astigmatism 94
Efficient optical zone 193f
Elevation-based devices (tomographers) 10
Emmetropic eyes 119
in anterior elevation maps 156f
in curvature maps 156f
in posterior elevation maps 157f
in thickness maps 157f
Endothelium 13
Entities misdiagnosed ectasia 191
Epithelial basement membrane dystrophy 223
Examiner's error misalignment 144
Excess tears 152f
F
Focal corneal opacities 199
Focal point 3f
Fourier analysis
decentration component in 139f
irregularity component in 139f
spherical component in 139f
Fourier transform 137
Foveola 3f
Fuchs’ endothelial dystrophy, diagnosis of 67
H
Halos 131f
Headscarves, tight 152
Height decentration, index of 183
Hot spot pattern 202f
Hybrid devices 12
Hypermetropic correction 195
Hyperopic population 58t
Hyperopic shift 143
Hyperprolate surface 83
Hypertrophy 99
I
Incision, dimensions of 225f
Intereye corneal asymmetry score 153t
Intraocular pressure 35
Irregular patterns 57
K
classification of 177
stages of 178t
center 183
mild 223
posterior 176
suspect 143
with normal thickness 168f
Keratometric calibration index 38
Keratometric dioptric power 103
Keratometric index 108
Keratometry 8
Keratoscopy 8
L
Lamellar keratitis, diffuse 95
Lamellar keratoplasty 97
Laser in situ keratomileusis 41
Lens thickness 35
M
Map overlay, thickness 23
Mesopic pupil, measurement of 108f
Modulation transfer function 119
Multifocal corneal opacities 203
Multifocal intraocular lens 4
Myopia 91
Myopic keratorefractive procedures 83
Myopic population 58t
N
Nasal temporal asymmetry in normal cornea 5f
Nonoptimum spectacle 101
Numeric scoring systems 153
Numeric values 66
P
Pachy apex 34
Pachymetric data 66
Parallel light rays 117
Patient noncooperation 152
Peripheral extrapolation, mild 22f
Peripheral scar 99f
Phakic intraocular lens 13
Phase transfer function 120
Photokeratoscopy 8
Placido-based technology 12
Point spread function 119
Post-corneal-rings implantation, patterns of 199
Post-graft pattern 199
Post-hypermetropic
astigmatic ablation 196
Postkeratorefractive procedures 41
Power distribution map 107f
Prism 127f
Prolate surface 83
Pupil
and thinnest location coordinates 25
center 34
coordinates, unusual 146
zones centered on 211
entrance 3f
size 119
Pupillary axis 3
R
Refractive display, four maps 15f
Refractive effect 36
Refractive errors, spherocylindrical 123
Refractive index 38
Refractive surgery, previous 223
Retinoscopy, irregular reflex on 100
Retrocorneal membrane 97
Rigid gas permeable contact lenses 143
Root mean square 96
S
Salzmann's nodular degeneration 223
Scanning-slit devices 10
Scheimpflug corneal imaging 178
Scheimpflug law states 11
Scheimpflug system 11
Scheimpflug-based devices 11
Scissoring reflex 100
Scleral incisions 224f
Screening guidelines 13
Sim-K measurement 8f
Skewed hourglass 153
Spherical component 137
Spherical power 182
Spherical surface 83
Starburst 131f
Sturm, interval of 92f
Symmetric bowtie inferior steep 153
T
Tears on tomography, effect of excess 152f
Testing system, normal noise of 181
Thickness map, changes in 145
Tilt 127f
Tissue altered, percent of 67
Tomographers, types of 10
Topometric indices 182
Toxic keratopathy, central 95
Transitional zone 193f
Trifolium plant 129