Contributing Authors

ix

Preface

xi

Acknowledgements

xiii

PART I

INTRODUCTION

1

Historical Perspective   Nathan Efron

3

2

The Anterior Eye   John G. Lawrenson

10

3

Visual Optics   W. Neil Charman

30

4

Clinical Instruments   Lyndon W. Jones and Sruthi Srinivasan

47

PART II

SOFT CONTACT LENSES

5

Soft Lens Materials   Carole Maldonado-Codina

67

6

Soft Lens Manufacture   Nathan Efron and Steve Newman

86

7

Soft Lens Optics   W. Neil Charman

93

8

Soft Lens Measurement   Sudi Patel

100

9

Soft Lens Design and Fitting   Graeme Young

109

10

Soft Toric Lens Design and Fitting   Richard Lindsay

119

11

Soft Lens Care Systems   Philip B. Morgan

128

PART III

RIGID CONTACT LENSES

12

Rigid Lens Materials   Brian J. Tighe

145

13

Rigid Lens Manufacture   Nathan Efron and Steve Newman

154

14

Rigid Lens Optics   W. Neil Charman

162

15

Rigid Lens Measurement   Sudi Patel

168

16

Rigid Lens Design and Fitting   Grneme Young

176

17

Rigid Toric Lens Design and Fitting   Richard Lindsay

190

18

Rigid Lens Care Systems   Philip B. Morgan

197

PART IV

LENS REPLACEMENT MODALITIES

19

Unplanned Lens Replacement   Nathan Efron

203

20

Daily Soft Lens Replacement   Nathan Efron

209

21

Planned Soft Lens Replacement   Joe Tanner

217

22

Planned Rigid Lens Replacement   Craig A. Woods

225

PART V

SPECIAL LENSES AND FITTING CONSIDERATIONS

23

Scleral Lenses   Kenneth W. Pullum

233

24

Tinted Lenses   Nathan Efron and Suzanne Efron

243

25

Presbyopia   John Meyler

252

26

Continuous Wear   Noel A. Brennan and M.-L. Chantal Coles

266

27

Sport   Nathan Efron

281

28

Keratoconus   Karla Zadnik and Joseph T. Barr

287

29

High Ametropia   Joseph T. Barr

298

30

Paediatric Fitting   Cindy Tromans

303

31

Therapeutic Applications   Roger J. Buckley

310

32

Post-Refractive Surgery   Patrick J. Caroline

317

33

Post-Keratoplasty   Barry A. Weissman

322

34

Orthokeratology   Leo G. Carney

332

35

Diabetes   Clare O’Donnell

339

PART VI

PATIENT EXAMINATION AND MANAGEMENT

36

History Taking   Keith H. Edwards

347

37

Preliminary Examination   Adrian S. Bruce

352

38

Patient Education   Sarah L. Morgan

361

39

Aftercare   Loretta B. Szczotka-Flynn and Nathan Efron

369

40

Complications   Nathan Efron

388

41

Digital Imaging   Adrian S. Bruce and Milton M. Horn

416

42

Compliance   Nathan Efron

427

43

Practice Management   Nizar K. Hirji

433

APPENDICES

A

Contact Lens Design and Specifications

444

B

Contact Lens Tolerances

445

C

Vertex Distance Correction

446

D

Corneal Curvature - Corneal Power Conversion

448

E

Extended Keratometer Range Conversion

450

F

Soft Lens Average Thickness

452

G

Soft Lens Oxygen Performance

453

H

Constant Edge Clearance Rigid Lens Designs

455

I

Soft Toric Lens Misalignment Demonstrator

456

J

Dry Eye Questionnaire

457

K

Efron Grading Scales for Contact Lens Complications

459

Index

463