Low_resolution_Thesis_CDD_221009_public - Visual Optics and ...

More documents

Recommendations

Info

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

CHAPTER 4 Although the data are well fitted by linear regressions, the fitted lines only cross the origin at 400 mJ/cm 2 . This is a result of incubation, which is quantified as the number of the first pulses that do not contribute to ablation depth. Figure 4.3 shows the number of incubation pulses at all laser fluences, for the two materials. Filofocon A requires less incubation pulses than PMMA for a given fluence. The number of incubation pulses for Filofocon A is less than 2 above 140 mJ/cm 2 (4 pulses for PMMA). At 400 mJ/cm 2 the incubation is negligible (
ABLATION PROPERTIES OF FILOFOCON A (Fig. 4.2), and the Beer Lambert behavior of the ablation depth/pulse (Fig. 4.4). For all estimates, we checked that the number of pulses was above incubation and the fluence above the ablation threshold. 0.5 (a) Filofocon A Depth/pulse (m) 0.4 0.3 0.2 0.1 0 Fth = 105 Filofocon 10 pulses Filofocon 1 pulse R 2 = 0.94 R 2 = 0.98 4 4.5 5 5.5 6 ln (Fluence) Fth = 177 0.5 (b) PMMA Depth/pulse (m) 0.4 0.3 0.2 PMMA 10 pulses PMMA 1 pulse R 2 = 0.89 0.1 R 2 = 0.96 Fth = 94 Fth = 279 0 4 4.5 5 5.5 6 ln (Fluence) Fig. 4.4. Beer Lambert behavior for Filofocon A (a) and PMMA (b) for 10 and 1 pulses. The linear fits provide the estimated ablation thresholds (zero intercepts of the line), and the effective absorption coefficient (slopes). The regression coefficient, R 2 , and the ablation threshold, F th , are shown for each linear fit. For more than 10 pulses, the ablation threshold is lower in PMMA than in Filofocon A, while the effective absorption coefficient is higher for PMMA (Fig. 4.5). The ablation threshold decreases and the effective absorption coefficient increases with the number of pulses in both materials. Filofocon A ablation parameters approach asymptotic values faster (with lower number of pulses) than PMMA. With 40-pulse ablations, the values of ablation threshold and absorption coefficient for Filofocon A are less than 2% higher those at 100 pulses (F th = 90 mJ/cm 2 and eff = 36000 cm -1 ). 127
Page 1:
Doctoral thesis Corneal Ablation an
Page 5 and 6:
Contents Corneal Ablation and Conta
Page 7 and 8:
2.2.1. Fitting surfaces............
Page 9 and 10:
5.3.3. Ablation efficiency factors
Page 11:
10.5. DISCUSSION...................
Page 14 and 15:
We thank José Antonio Sánchez-Gil
Page 16 and 17:
BOZR Back Optic Zone Radius BCVA Be
Page 19 and 20:
INTRODUCTION 1.1. MOTIVATION The fr
Page 21 and 22:
INTRODUCTION 1.2. THE OPTICAL SYSTE
Page 23 and 24:
INTRODUCTION Myopia is a very commo
Page 25 and 26:
INTRODUCTION a point focus: the dif
Page 27 and 28:
INTRODUCTION system, and tilt repre
Page 29 and 30:
INTRODUCTION term Z 0 2 stands for
Page 31 and 32:
INTRODUCTION which image was shadow
Page 33 and 34:
INTRODUCTION The defocus Zernike te
Page 35 and 36:
INTRODUCTION 1.4.6.3. Internal Aber
Page 37 and 38:
INTRODUCTION 1.5.2.3. Alternating v
Page 39 and 40:
INTRODUCTION and further-more, at l
Page 41 and 42:
INTRODUCTION alcohol is used to loo
Page 43 and 44:
INTRODUCTION changes in reflectivit
Page 45 and 46:
INTRODUCTION Marcos et al. (Marcos
Page 47 and 48:
INTRODUCTION 1.7.3. Ablation effici
Page 49 and 50:
INTRODUCTION corneal surface may be
Page 51 and 52:
INTRODUCTION Algorithm design: The
Page 53 and 54:
INTRODUCTION contact lenses the fie
Page 55 and 56:
INTRODUCTION 1.10.1. Tear studies A
Page 57 and 58:
INTRODUCTION there are still many u
Page 59 and 60:
INTRODUCTION 6. Evaluation and unde
Page 61 and 62:
METHODS 2Chapter Chapter 2 - Method
Page 63 and 64:
METHODS 2.1. MEASUREMENT OF OPTICAL
Page 65 and 66:
METHODS In both profilometers, cust
Page 67 and 68:
METHODS The measurement method that
Page 69 and 70:
METHODS Fig. 2. 9. Set of points in
Page 71 and 72:
METHODS Slit lamp Scheimpflug Camer
Page 73 and 74:
METHODS representing the deviation
Page 75 and 76: METHODS 2.2.2.2. Ablation pattern f
Page 77 and 78: METHODS direction. These calculatio
Page 79 and 80: METHODS eye through the whole pupil
Page 81 and 82: METHODS (1993) power thresholds for
Page 83 and 84: METHODS alignment (frontal-illumina
Page 85 and 86: METHODS Fig. 2. 24. Example frame f
Page 87 and 88: METHODS 4) New image processing too
Page 89 and 90: METHODS Fig. 2. 28. Corrected entra
Page 91 and 92: METHODS Badal lens, corresponds to
Page 93: METHODS Each VA measurement consist
Page 99: REFRACTIVE SURGERY PMMA MODEL 3.1.
Page 102 and 103: CHAPTER 3 optimization of refractiv
Page 104 and 105: CHAPTER 3 These data demonstrate th
Page 106 and 107: CHAPTER 3 regression line, since it
Page 108 and 109: CHAPTER 3 Figure 3.3 shows one of t
Page 110 and 111: CHAPTER 3 Ablation efficiency facto
Page 112 and 113: CHAPTER 3 considering the same set
Page 114 and 115: CHAPTER 3 3.5.3 Impact of correctio
Page 117: ABLATION PROPERTIES OF FILOFOCON A
Page 121 and 122: ABLATION PROPERTIES OF FILOFOCON A
Page 137: OPTIMIZED LASER PLATFORMS 5.1 ABSTR
Page 140 and 141: CHAPTER 5 pulses. Fluence, repetiti
Page 142 and 143: CHAPTER 5 ablations. The slit-confo
Page 144 and 145: CHAPTER 5 (Anera et al., 2003): d S
Page 146 and 147: CHAPTER 5 asymmetries also appeared
Page 148 and 149: CHAPTER 5 5.3.4. Ablation patterns
Page 150 and 151: 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
Page 177 and 178:
ANTERIOR AND POSTERIOR CORNEAL ELEV
Page 179 and 180:
Page 181 and 182:
Page 183:
183
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:
Page 200 and 201:
Page 202 and 203:
Page 204 and 205:
Page 206 and 207:
Page 208 and 209:
Page 210 and 211:
Page 212:
SOFT MONOFOCAL AND MULTIFOCAL CONTA
Page 216:
SOFT MONOFOCAL AND MULTIFOCAL CONTA
Page 220 and 221:
CORRELATION BETWEEN RADIUS AND ASPH
Page 222 and 223:
Page 224 and 225:
Page 226 and 227:
Page 228 and 229:
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
Page 274 and 275:
RESÚMENES 9 Prestaciones ópticas
Page 276 and 277:
RESÚMENES 10 Calidad óptica y cal
Page 278:
RESÚMENES A Correlación entre rad
Page 281 and 282:
CONCLUSIONES clínicos. La descripc
Page 283 and 284:
CONCLUSIONES 12 Las superficies ocu
Page 286:
CONCLUSIONES IMPLICACIONES DE ESTA
Page 289 and 290:
CONCLUSIONES contribuyen a la compr
Page 291:
(y muchísimo más difícil). Me da
show all

Low_resolution_Thesis_CDD_221009_public - Visual Optics and ...

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?