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A computational model to optimize vision correction via contact lens design

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dc.contributor.author Karunarathna, S. P. D. S. S. K.
dc.date.accessioned 2019-01-18T08:46:49Z
dc.date.available 2019-01-18T08:46:49Z
dc.date.issued 2018
dc.identifier.citation Karunarathna, S. P. D. S. S. K. (2018). A computational model to optimize vision correction via contact lens design. Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka. p111. en_US
dc.identifier.uri http://repository.kln.ac.lk/handle/123456789/19562
dc.description.abstract A contact lens typically assumes different positions with respect to the pupil after each blink and saccade, and lens motion may cause a loss in visual acuity. An exact understanding of the loss of visual acuity is lacking in current literature. By estimating the precise threedimensional lens motion on the cornea, combined with an accurate lens model, we compute the loss of visual acuity as a consequence of lens motion for myopic patients, using a ray tracing approach. Using markers on the lens, we calculate a three-dimensional rotation matrix that corresponds to the apparent two-dimensional rotation and decentration. To determine the wavefront for a different lens position, we use reverse ray tracing to propagate the measured wavefront back through the lens and tear, and forward ray tracing to propagate it forward to the new lens position in such a way that the optical path length is preserved. The lens’ motion leads to a coma component in the new wavefront. As the lens’ motion alters the visual acuity, rotational stability of contact lenses is necessary for consistent visual acuity after correction. We propose a contact lens model to mitigate the loss of visual acuity caused by lens motion through a numerical simulation. en_US
dc.language.iso en en_US
dc.publisher Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka en_US
dc.subject Contact lens en_US
dc.subject decentration en_US
dc.subject ray tracing en_US
dc.subject visual acuity en_US
dc.subject wavefront en_US
dc.title A computational model to optimize vision correction via contact lens design en_US
dc.type Article en_US


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