Low_resolution_Thesis_CDD_221009_public - Visual Optics and ...

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

ON-EYE OPTICAL PERFORMANCE OF RIGID GAS PERMEABLE CONTACT LENSES S1 TOTAL ANTERIOR SURFACE S2 TOTAL ANTERIOR SURFACE WITH ASTIGMATISM WITHOUT CL WITH CL 1.36 1.29 WITH ASTIGMATISM WITHOUT CL WITH CL 1.00 0.77 0.46 0.57 0.70 0.92 WITHOUT ASTIGMATISM WITHOUT CL WITH CL 0.77 0.67 WITHOUT ASTIGMATISM WITHOUT CL WITH CL 0.18 0.25 0.39 0.42 0.24 0.51 S3 TOTAL ANTERIOR SURFACE S4 TOTAL ANTERIOR SURFACE WITH ASTIGMATISM WITHOUT CL WITH CL 0.89 0.91 WITH ASTIGMATISM WITHOUT CL WITH CL 0.37 0.51 0.69 0.98 0.46 0.46 WITHOUT ASTIGMATISM WITHOUT CL WITH CL 0.23 0.18 WITHOUT ASTIGMATISM WITHOUT CL WITH CL 0.13 0.24 0.16 0.30 0.24 0.36 Fig. 9.2 Wave aberration maps for all subjects. For each subject we show the four wavefronts measured: total (left panel) and anterior surface (right panel), with and without rigid gas permeable contact lens (RGP CL). Anterior surface aberrations stand for aberrations of the anterior corneal surface for the natural eye, and aberrations of the anterior surface of the CL when the eye is wearing the CL. For each subject, the four upper maps include all aberrations except tilt and defocus, and in the 213
CHAPTER 9 four lower maps astigmatism has also been removed. Contours have been plotted at 1 m interval. Pupil diameter is 5 mm in all cases. The RMS (in microns) is indicated for each wavefront. To show the effect of CL wear, we have used the same gray scale for anterior surface and total aberration maps for the same subject. Contours have been plotted at 1 m intervals. Pupil size is 5-mm in all cases. In many cases, and most obviously for S1, the number of contour lines is lower with the CL, indicating a correction of the natural aberrations by the CL. Not only astigmatism decreases (see upper maps), but also higher order aberrations. We found an increase of aberrations with CL only for S4, whose natural aberrations were very low. While the amount of aberrrations decreases in most cases, the aberration pattern with CL follows a pattern similar to the natural wave aberration. This is indicative of some degree of conformity. There is a strong similarity between total and anterior surface wave aberration maps in all subjects and conditions. Figure 9.3 compares Zernike coefficients for two representative subjects (S1 and S3). S1 (Figs. 9.3(a) and 9.3(b)) is the subject with the highest amount of aberrations without CLs, and highest degree of compensation with RGP CLs. S3 (Figs. 9.3(c) and 9.3(d)) has high astigmatism but low high order aberrations. The ordering and notation of the Zernike coefficients follows the recommendations of the Optical Society of America Standard Committee (Thibos et al., 2000). Zernike coeff. amplitude (microns) Zernike coeff. amplitude (microns) 1.5 Total aberrations 1.0 0.5 0.0 -0.5 -1.0 S1 Without CL With CL -1.5 0 10 20 30 Zernike coefficient # 1.0 Total aberrations 0.5 0.0 -0.5 a S3 Without CL With CL -1.0 0 10 20 30 Zernike coefficient # c Zernike coeff. amplitude (microns) Zernike coeff. amplitude (microns) 1.5 Anterior Surface aberrations 1.0 0.5 0.0 -0.5 -1.0 -1.5 0 10 20 30 Zernike coefficient # 1.0 Anterior Surface aberrations 0.5 0.0 -0.5 S1 Without CL With CL b S3 Without CL With CL -1.0 0 10 20 30 Zernike coefficient # d Fig. 9.3. Zernike coefficients for subjects S1 and S3. (a) Total aberrations with and without CL for S1; (b) Anterior surface aberrations with and without CL for S1;(c) Total aberrations with and without CL for S3; (d) Anterior surface aberrations with and without CL for S3. For subject S1, total astigmatism (terms 3 and 5) is well corrected, but there is also a large reduction of 3 rd and higher order aberrations –see for example coefficient 12 (Z 4 0 ) and 13 (Z 4 -2 ) in Fig. 9.3(a)–. All the most significant anterior surface aberration 214
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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.
Page 152 and 153: CHAPTER 5 achieve proper reflection
Page 154 and 155: CHAPTER 5 Both the ablation algorit
Page 157: HYBRID PORCINE/PLASTIC MODEL 6.1. A
Page 160 and 161: CHAPTER 6 6.3.1. Hybrid porcine-pla
Page 162 and 163: CHAPTER 6 is detected. Therefore, i
Page 164 and 165: CHAPTER 6 no preferential orientati
Page 167: ANTERIOR AND POSTERIOR CORNEAL ELEV
Page 171 and 172: ANTERIOR AND POSTERIOR CORNEAL ELEV
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Page 187: SOFT CONTACT LENS FITTING USING MOD
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Page 194: ON-EYE OPTICAL PERFORMANCE OF RIGID
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Page 212: SOFT MONOFOCAL AND MULTIFOCAL CONTA
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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
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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.
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REFERENCES KOPF, M., YI, F., ISKAND
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REFERENCES MARCOS, S., DORRONSORO,
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REFERENCES NOVO, A., PAVLOPOULOS, G
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REFERENCES SAKIMOTO, T., ROSENBLATT
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REFERENCES WANG, L., DAI, E., KOCH,
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RESÚMENES pacientes reales fue com
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RESÚMENES experimentales de cirug
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RESÚMENES cada punto de las cornea
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RESÚMENES plástico medidas anteri
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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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