Figure 1: Sagittal power map of a sphere, r = 8 mm.............................................................................................................................. 7

Figure 2: Snell´s law of refraction................................................................................................................................................................ 8

Figure 3. Refractive power map of a sphere, r = 8 mm.......................................................................................................................... 8

Figure 4: True Net Power map calculated by two spheric surfaces of anterior r = 8mm and posterior r = 6.58 mm......... 9

Figure 5: EKR power map calculated by twospheric surfaces of anterior r = 8mm and posterior r = 6.58 mm................... 10

Figure 6: Calculation of power according to Snell´s law taking the different refractive indices and the different

principal planes of the anterior and posterior corneal surfaces into accout.................................................................. 11

Figure 7: Total Corneal Refractive Power map calculated by two spheric surfaces of anterior r = 8mm and posterior

r = 6.58mm and pachiketry........................................................................................................................................................... 11

Figure 8: Placido based topography of OD and OS allowing no conclusion regarding keratoconus.........................................15

Figure 9: 4 Maps Selectable showing keratoconus-suspicious elevations in OD............................................................................16

Figure 10: 4 Maps Selectable showing significant elevation in OS...................................................................................................... 17

Figure 11: Placido based topography of OD and OS.................................................................................................................................. 18

Figure 12: 4 Maps Selectable showing a form fruste keratoconus false-positive topography in OS ........................................ 19

Figure 13: 4 Maps Selectable showing a form fruste keratoconus false-positive topography in OD......................................... 19

Figure 14: Fast Screening Report showing abnormal pachymetry and elevation data with unambiguous signs of

keratoconus in OD........................................................................................................................................................................... 21

Figure 15: Fast Screening Report showing abnormal pachymetry and elevation data with unambiguous signs of

keratoconus in OS............................................................................................................................................................................21

Figure 16: Belin/Ambrósio Enhanced Ectasia Display (version III) showing keratokonus in OD................................................... 22

Figure 17: Belin/Ambrósio Enhanced Ectasia Display (version III) showing keratokonus in OS....................................................22

Figure 18: Compare 4 Exams for postoperative monitoring of corneal deturgescence over the course of one month.........23

Figure 19: Fast Screening Report showing the presurgical condition in a case of Fuchs' dystrophy.......................................... 24

Figure 20: Fast Screening Report at one month after DMEK surgery................................................................................................... 24

Figure 21: Corneal Optical Densitometry showing the presurgical condition in a case of Fuchs' dystrophy............................25

Figure 22: Corneal Optical Densitometry at one month after DMEK surgery.....................................................................................25

Figure 23: Fast Screening Report showing suspicious values of K Max (anterior surface) and anterior and posterior

elevation.............................................................................................................................................................................................26

Figure 24: 4 Maps Refractive with suspicious curvature and elevation maps of the anterior surface.......................................27

Figure 25: Compare 2 Exams showing changes in anterior surface elevation within a period of one week............................ 27

Figure 26: 4 Maps Refractive showing with unremarkable elevation maps and curvature map in OD......................................29

Figure 27: 4 Maps Refractive showing unremarkable elevation maps and curvature map in OS................................................ 29

Figure 28: Corneal Power Distribution showing normal power distribution in OD...........................................................................30

Figure 29: Corneal Power Distribution showing a markedly increased power from 2.0 to 3.0 mm in OS................................. 30

Figure 30: 4 Maps Refractive of OD showing post-LASIK ectasia..........................................................................................................31

Figure 31: 4 Maps Refractive of OS showing post-LASIK ectasia...........................................................................................................32

Figure 32: Pachymetry progression in OD..................................................................................................................................................... 32

Figure 33: Pachymetry progression in OS..................................................................................................................................................... 32

Figure 34: Orbscan® incorrencly suggests post-LASIK ectasia................................................................................................................33

Figure 35: 4 Maps Selectable revealing there to be no post-LASIK ectasia........................................................................................34

Figure 36: Orbscan® 4 maps incorrectly suggesting ectasia in OD....................................................................................................... 35

Figure 37: Pentacam® 4 Maps Selectable revealing there to be no post-LASIK ectasia.................................................................35

Figure 38: 4 Maps Refractive revealing a thick cornea..............................................................................................................................36

Figure 39: HRT image..........................................................................................................................................................................................36

Figure 40: HRT image..........................................................................................................................................................................................36

Figure 41: General Overview display showing status in OS prior to YAG laser iridectomy.............................................................37

Figure 42: General Overview display 10 days after YAG laser iridectomy in OS showing improved ACA and ACD values... 38

Figure 43: Compare 2 Exams showing changes from before to 10 days after YAG laser iridectomy in OS.............................. 38

Figure 44: Slit lamp gonioscopy pictures showing a narrow angle in all four quadrants...............................................................39

Figure 45: General Overview display showing a low ACV, shallow ACD and narrow angle in OD............................................... 40

Figure 46: General Overview display showing a low ACV, shallow ACD and narrow angle in OS............................................... 40

Figure 47: 24-2 Humphrey visual field: full visual field in OD............................................................................................................... 41

Figure 48: 24-2 Humphrey visual field: full visual field in OS................................................................................................................ 41

Figure 49: Spectral domain OCT showingnormal RNFL thickness in both eyes................................................................................. 41

Figure 50: General Overview display showing a low ACV, shallow ACD and narrow angle in OD............................................... 42

Figure 51: General Overview display showing a low ACV, shallow ACD and narrow angle in OS............................................... 43

Figure 52: 24-2 Humphrey visual field showing an early superior arcuate defect in OD...............................................................44

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