Low_resolution_Thesis_CDD_221009_public - Visual Optics and ...
Low_resolution_Thesis_CDD_221009_public - Visual Optics and ...
Low_resolution_Thesis_CDD_221009_public - Visual Optics and ...
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Contents<br />
Corneal Ablation <strong>and</strong> Contact Lens Fitting:<br />
Physical, Optical <strong>and</strong> <strong>Visual</strong> Implications<br />
ACKNOWLEDGEMENTS ...................................................................................... 13<br />
KEY WORDS ............................................................................................................ 15<br />
ABBREVIATIONS ................................................................................................... 16<br />
CHAPTER 1 - INTRODUCTION ........................................................................... 17<br />
1.1. MOTIVATION ..................................................................................................... 19<br />
1.2. THE OPTICAL SYSTEM OF THE EYE ..................................................................... 21<br />
1.2.1. Cornea................................................................................................................. 21<br />
1.2.2. Lens ........................................................................................................... 22<br />
1.3. MYOPIA AND PRESBYOPIA................................................................................. 22<br />
1.3.1. Myopia....................................................................................................... 22<br />
1.3.2. Presbyopia................................................................................................. 23<br />
1.4. OPTICAL ABERRATIONS ..................................................................................... 24<br />
1.4.1. Chromatic aberrations .............................................................................. 24<br />
1.4.2. Monochromatic aberrations ...................................................................... 24<br />
1.4.3. Seidel aberrations...................................................................................... 26<br />
1.4.4. Zernike representation of aberrations ....................................................... 27<br />
1.4.5. Measurement of Optical Aberrations ........................................................ 29<br />
1.4.5.1. Basic concepts of ocular aberrations ................................................................ 30<br />
1.4.5.2. Early aberrometers ........................................................................................... 30<br />
1.4.5.3. The Hartmann-Shack (HS) aberrometer........................................................... 31<br />
1.4.5.4. The Laser Ray Tracing aberrometer (LRT)...................................................... 32<br />
1.4.6. Optical aberrations in the human eye........................................................ 32<br />
1.4.6.1. Ocular Aberrations........................................................................................... 32<br />
1.4.6.2. Corneal Aberrations ......................................................................................... 34<br />
1.4.6.3. Internal Aberrations: interaction between total <strong>and</strong> corneal aberrations........... 35<br />
1.5. CURRENT METHODS OF CORRECTION................................................................. 35<br />
1.5.1. Myopia correction ..................................................................................... 35<br />
5