Abstract
Visual system has been part of human central nervous system to detect and interpret information from visible light to build a representation of the surrounding world; hence, if the vision of a human is poor, then correction of ametropia would be important in optometry. Normal correction methods prescribed by ophthalmologists include spectacles, LASIK, RGP contact lenses and soft contact lenses. Today, soft contact lenses are popular because of convenience and economic consideration. However, soft contact lenses deform easily on cornea with resultant variable optical characteristics often lead to ineffective correction. It is necessary to design soft contact lenses with precision and adaptation so that visual acuity can be compensated in high order aberrations. In this thesis, the objectives are to establish human eye model for vision analysis, design soft contact lenses, and assess basic manufacture processes. With the established eye model, fundamental issues of eye conditions can be realized. Then, design of soft contact lenses is based on back optical zone radius, front optical zone radius, center thickness and surface asphericity to correct ametropia and aberrations. With the help of standard eye charts, the eye model with soft contact lens can form an image on retina for illustration correction in ametropia. Finally, preliminary experiments in curing of HEMA and DEAP with UV light sources would provide knowledge in effective water contents of the polymer for estimation of profile accuracy in dry contact lenses. The results of the study provide a solid foundation for advanced investigation of soft contact lenses in the furture.