Low_resolution_Thesis_CDD_221009_public - Visual Optics and ...

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$XXX Congress of the European Society of Cataract and Refractive ...$

CORRELATION BETWEEN RADIUS AND ASPHERICITY topography, data in the horizontal meridian are more reliable than those of the vertical meridian, and only the radii and asphericities for the horizontal meridian are depicted. 0.1 a 0.05 b 0 0 Q -0.1 -0.2 Q -0.05 -0.1 7.7 7.8 7.9 R (mm) 7.75 7.8 7.85 R (mm) Fig. A.4. Correlation between fitted radius and asphericity, for Placido disk videokeratoscopy data of the anterior corneal surface of (a) Subject 1 and (b) Subject 2. Data are fitted to non-rotationally symmetric ellipsoids. The plotted data are for the horizontal meridian. The correlation in the horizontal direction is stronger than the corresponding correlations for the vertical direction or for rotationally symmetric fits (not shown), but all correlations are highly significant (Table A.1). In general, the videokeratoskopy data show a lower correlation than the Scheimpflug-imaging data. Table A.1. Correlations between fitted radii and asphericities in the experimental data: Correlation coefficient (r), p-value of the correlation (p) and number of measurements (n). “Multiple” refers to data from a group of LASIK patients and non-operated controls. 249
ANNEX A Figure A.5 shows the correlation between radius and asphericity of repeated measurements of the profile of an aspheric intraocular lens, obtained with the Pl noncontact optical profilometer. The correlation is also very high, r=0.83, p=4·10 -10 . Q -33.1 -33.2 -33.3 -33.4 -33.5 -33.6 -33.7 -33.8 19.75 19.8 19.85 19.9 R (mm) Fig. A.5. Correlation between fitted radii and asphericities for the profilometer data. Note that in this case, corresponding to a strongly aspherical intraocular lens (with a very different geometry from that of normal eyes) the slope is much higher. Therefore, this graph has been plotted with a different aspect ratio than Figs. A.2-A.4. A.4.2. Simulations We built a synthetic dataset corresponding to a perfect ellipsoid with R=8 mm and Q= 0.3. When no noise is added to the data, the fitting algorithm provides exactly the correct ellipsoid parameters. The noise added to the synthetic ellipsoids causes dispersion in the fitted parameters, Fig. A.6, and the correlation arises (r=0.95, p
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Doctoral thesis Corneal Ablation an
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Contents Corneal Ablation and Conta
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2.2.1. Fitting surfaces............
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5.3.3. Ablation efficiency factors
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10.5. DISCUSSION...................
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We thank José Antonio Sánchez-Gil
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BOZR Back Optic Zone Radius BCVA Be
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INTRODUCTION 1.1. MOTIVATION The fr
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INTRODUCTION 1.2. THE OPTICAL SYSTE
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INTRODUCTION Myopia is a very commo
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INTRODUCTION a point focus: the dif
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INTRODUCTION system, and tilt repre
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INTRODUCTION term Z 0 2 stands for
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INTRODUCTION which image was shadow
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INTRODUCTION The defocus Zernike te
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INTRODUCTION 1.4.6.3. Internal Aber
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INTRODUCTION 1.5.2.3. Alternating v
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INTRODUCTION and further-more, at l
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INTRODUCTION alcohol is used to loo
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INTRODUCTION changes in reflectivit
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INTRODUCTION Marcos et al. (Marcos
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INTRODUCTION 1.7.3. Ablation effici
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INTRODUCTION corneal surface may be
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INTRODUCTION Algorithm design: The
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INTRODUCTION contact lenses the fie
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INTRODUCTION 1.10.1. Tear studies A
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INTRODUCTION there are still many u
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INTRODUCTION 6. Evaluation and unde
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METHODS 2Chapter Chapter 2 - Method
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METHODS 2.1. MEASUREMENT OF OPTICAL
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METHODS In both profilometers, cust
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METHODS The measurement method that
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METHODS Fig. 2. 9. Set of points in
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METHODS Slit lamp Scheimpflug Camer
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METHODS representing the deviation
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METHODS 2.2.2.2. Ablation pattern f
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METHODS direction. These calculatio
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METHODS eye through the whole pupil
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METHODS (1993) power thresholds for
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METHODS alignment (frontal-illumina
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METHODS Fig. 2. 24. Example frame f
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METHODS 4) New image processing too
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METHODS Fig. 2. 28. Corrected entra
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METHODS Badal lens, corresponds to
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METHODS Each VA measurement consist
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REFRACTIVE SURGERY PMMA MODEL 3.1.
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CHAPTER 3 optimization of refractiv
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CHAPTER 3 These data demonstrate th
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CHAPTER 3 regression line, since it
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CHAPTER 3 Figure 3.3 shows one of t
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CHAPTER 3 Ablation efficiency facto
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CHAPTER 3 considering the same set
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CHAPTER 3 3.5.3 Impact of correctio
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ABLATION PROPERTIES OF FILOFOCON A
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OPTIMIZED LASER PLATFORMS 5.1 ABSTR
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CHAPTER 5 pulses. Fluence, repetiti
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CHAPTER 5 ablations. The slit-confo
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CHAPTER 5 (Anera et al., 2003): d S
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CHAPTER 5 asymmetries also appeared
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CHAPTER 5 5.3.4. Ablation patterns
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CHAPTER 5 a) b) : 6.5 mm c) Fig. 5.
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CHAPTER 5 achieve proper reflection
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CHAPTER 5 Both the ablation algorit
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HYBRID PORCINE/PLASTIC MODEL 6.1. A
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CHAPTER 6 6.3.1. Hybrid porcine-pla
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CHAPTER 6 is detected. Therefore, i
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CHAPTER 6 no preferential orientati
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ANTERIOR AND POSTERIOR CORNEAL ELEV
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ANTERIOR AND POSTERIOR CORNEAL ELEV
Page 173 and 174: ANTERIOR AND POSTERIOR CORNEAL ELEV
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Page 187: SOFT CONTACT LENS FITTING USING MOD
Page 191 and 192: SOFT CONTACT LENS FITTING USING MOD
Page 194: ON-EYE OPTICAL PERFORMANCE OF RIGID
Page 198 and 199: ON-EYE OPTICAL PERFORMANCE OF RIGID
Page 212: SOFT MONOFOCAL AND MULTIFOCAL CONTA
Page 216: SOFT MONOFOCAL AND MULTIFOCAL CONTA
Page 220 and 221: CORRELATION BETWEEN RADIUS AND ASPH
Page 230: CONCLUSIONS Conclusions This thesis
Page 233 and 234: CONCLUSIONS 5We have developed a pr
Page 236: CONCLUSIONS LIST OF METHODOLOGICAL
Page 240 and 241: CONCLUSIONS FUTURE RESEARCH LINES T
Page 242 and 243: CONCLUSIONS LIST OF PUBLICATIONS AN
Page 244 and 245: REFERENCES References AIZAWA, D., S
Page 246 and 247: REFERENCES PHOTODECOMPOSITION (APD)
Page 248 and 249: REFERENCES DORRONSORO, C., CANO, D.
Page 250 and 251: REFERENCES GISPETS, J., ARJONA, M.
Page 252 and 253: REFERENCES KOPF, M., YI, F., ISKAND
Page 254 and 255: REFERENCES MARCOS, S., DORRONSORO,
Page 256 and 257: REFERENCES NOVO, A., PAVLOPOULOS, G
Page 258 and 259: REFERENCES SAKIMOTO, T., ROSENBLATT
Page 260: REFERENCES WANG, L., DAI, E., KOCH,
Page 263 and 264: RESÚMENES pacientes reales fue com
Page 265 and 266: RESÚMENES experimentales de cirug
Page 267 and 268: RESÚMENES cada punto de las cornea
Page 269 and 270: RESÚMENES plástico medidas anteri
Page 272 and 273: RESÚMENES 8 Evaluación óptica de
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RESÚMENES 9 Prestaciones ópticas
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RESÚMENES 10 Calidad óptica y cal
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RESÚMENES A Correlación entre rad
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CONCLUSIONES clínicos. La descripc
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CONCLUSIONES 12 Las superficies ocu
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CONCLUSIONES IMPLICACIONES DE ESTA
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CONCLUSIONES contribuyen a la compr
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(y muchísimo más difícil). Me da
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