by Lam Shun-Chiu Dennis. / Thesis (M.D.)--Chinese University of Hong Kong, 2002. / Includes bibliographical references (p. 159-172). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Mode of access: World Wide Web.

The objective of the present studies was to assess whether there were predictable differences in the thickness of the human cornea in relation to stable manifest refractive error using a scanning slit optical topography method (Orbscan II).

Dissertation submitted in partial compliance with the requirements for the Master's Diploma in Technology, Homoeopathy at Technikon Natal, 1994. / The purpose of this project was to determine how effective Physostigma venenosum is as a Homoeopathic treatment of myopia. Myopia does not have a history of spontaneous remission, therefore some form of treatment is required. Glasses and contact lenses, both widely used, have been of tremendous value in relieving the symptoms\xB7 of myopia. / M

M.Tech. (Biotechnology) / Spectacles and contact lenses are the most widely used optical appliances to manage myopia. Surgical techniques are an alternative but the outcome of surgery can be unpredictable and the procedures are costly. Myopia, or nearsightedness, is a condition characterised by blurred distant vision. Both a more lasting cure and a more cost-effective alternative solution in the treatment of myopia are desirable. The effectiveness of the homoeopathic remedy, Physostigma 30CH on its own, the Bates method on its own and a combination of the homoeopathic remedy and the Bates method in reducing myopia were determined. Thirty suitable myopic subjects between the ages of 21 - 34 years were selected. Subjects were paired in terms of age, race and sex on a double-blind basis. This research was conducted in three stages of thirty days each. During stage one the experimental group performed the Bates method, while the control group performed the modified Bates method. During stage two the experimental group received the .homoeopathic remedy, Physostigma 30CH, whilst the control group received a placebo. During stage three the experimental group performed the Bates method and received the homoeopathic remedy, Physostigma 30CH, whilst the control group performed the modified Bates method and received the placebo. Each subject underwent an optometric examination before and after each of the abovementioned stages. During the eye examination, the aided and unaided visual acuity, left and right refractions, accommodative flexibility and accommodation amplitude were determined by a qualified optometrist. After each eye examination a questionnaire was completed to determine the patient's subjective feelings ofthe treatment. The data was analyzed using a 2-sample t-test (incorporating the Levence test) for determining the statistical significance within each different stage of the research. The significant (2-tailed) p-values for the statistical significance between the two groups were obtained in order to indicate whether there was a reduction in myopia in either the experimental or the control group or both.

by Maksudul Islam. / Publication date from spine. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1995. / Includes bibliographical references (leaves 58-65). / Questionaire also in Chinese. / Chapter CHAPTER1 --- ABSTRACT --- p.1 / Chapter CHAPTER2 --- INTRODUCTION --- p.3 / Chapter CHAPTER3 --- OBJECTIVES --- p.7 / Chapter CHAPTER4 --- LITERATURE REVIEW --- p.8 / Chapter 4.1.1 --- BACKGROUND --- p.8 / Chapter 4.1.2 --- GENETIC AND ENVIRONMENTAL STUDY --- p.9 / Chapter 4.1.3 --- EPIDEMIOLOGY OF MYOPIA --- p.14 / Chapter 4.1.4 --- RELATIONSHIP BETWEEN MYOPIA & OPTICAL COMPONENTS --- p.18 / Chapter 4.1.5 --- AXIAL LENGTH --- p.19 / Chapter 4.1.6 --- VITREOUS LENGTH --- p.20 / Chapter 4.1.7 --- CHANGES OF REFRACTION IN SCHOOL CHILDREN --- p.21 / Chapter 4.1.8 --- DEVELOPMENT OF MYOPIA --- p.23 / Chapter 4.1.9 --- EMMETROPIZATION --- p.26 / Chapter 4.1.10 --- SEX --- p.27 / Chapter 4.1.11 --- FACTORS --- p.29 / Chapter CHAPTER5 --- METHODS --- p.34 / SUBJECTS --- p.34 / PROCEDURE --- p.35 / Chapter CHAPTER6 --- RESULTS --- p.37 / Chapter 6.1.1 --- THE DISTRIBUTION OF REFRACTION --- p.37 / Chapter 6.1.2 --- THE RELATION BETWEEN AGE WITH REFRACTION AND OPTICAL COMPONENTS --- p.38 / Chapter 6.1.3 --- RELATION BETWEEN SEX AND REFRACTION --- p.39 / Chapter 6.1.4 --- RELATION BETWEEN REFRACTION AND OPTICAL COMPONENTS --- p.39 / Chapter 6.1.5 --- RELATION BETWEEN REFRACTION AND VISUAL TASK --- p.40 / Chapter 6.1.6 --- RELATION BETWEEN OCULAR COMPONENTS AND VISUAL TASK --- p.42 / Chapter 6.1.7 --- RELATION BETWEEN OCULAR COMPONENTS AND REFRACTION TO PARENTAL MYOPIA AND EDUCATION --- p.44 / Chapter CHAPTER7 --- DISCUSSION --- p.47 / Chapter CHAPTER8 --- REFERENCES --- p.58 / TABLES --- p.66 / FIGURES --- p.86 / APPENDIX I-II QUESTIONNAIRE IN CHINESE --- p.100 / APPENDIX III-IV QUESTIONNAIRE IN ENGLISH TRANSLATION --- p.110

published_or_final_version / Public Health / Master / Master of Public Health

No description available.

The aim of the present project was to analyse the link between peripheral posture, optics, optics and refractive error progression. Preliminary studies were conducted to ensure that peripheral aberrometry is valid for further analysis. The repeatability of the IRX-3 for peripheral aberrometry was asgood as for central measurements and the recalculation of elliptical pupils did not seem to be necessary for measurements up to 20 degrees eccentricity. Higher order aberration measurements werecomparable to other studies. Eye and head movements as well as working distance did not differ significantly between myopes and non-myopes. However, there was some evidence, that forward bending of the head during reading increases in association with higher refractive error progression rates. The link between central higher order aberrations and refractive error development was analysed by comparing higher order aberrations between isometropes and anisometropes. This analysisdid not show any significant association of higher order aberrations on the development, as no major differences were found between the two groups. For central vision, changes in biometric parameters during accommodation were analysed. It was found that biometric parameters change similarly in myopes and non-myopes. Peripheral accommodation was found to differ between myopes and emmetropes indicating that there might be an influence of peripheral refraction on myopisation. However, associationbetween peripheral refraction or peripheral aberrations and refractive error progression were not significant. The reason for this observation might be the low refractive error progression (0.04± 0.29 D in myopes and -0.12 ± 0.38 D in emmetropes) during one year in the study population.

published_or_final_version / Public Health / Master / Master of Public Health

D.Phil. (Optometry) / Please refer to full text to view abstract