In this paper, the bicubic spline interpolation and high-order polynomial methods were used to optimize the edge thickness of negative blended lenticular lens for patients having high myopia and astigmatism, which are large thickness and weight. For -8D lens with -2D cylinder in 180° axis, based on the setting a valid optical area, the outside area of the blended lenticular lens were designed . The optimized lenses were processed by CNC machine, measured and analyzed. The central optical area obtained via bicubic spline interpolation method is 48.98% greater than high-order polynomial method. The maximum thickness obtained using high polynomial method is 0.62% less than that obtained via bicubic spline interpolation method, which is 17.40% less than the original surface in 180° axis. The edge thickness under high polynomial method is 9.60% larger than bicubic spline interpolation method, which is 71.57% less than the original surface in 180° axis. Therefore, it was concluded that the bicubic spline interpolation method meets the requirements of the wearers. These methods are also suitable for designing other types of optical components.
The weight distributions (WDs) of spherical and cylindrical power deviations with the multiple convolution processing schemes indicate that the areas of the far and near zones can be increased by changing the WD without changing the distribution of the mean sphere. When the number of the multiple convolution processing schemes changed from 0 to 15, the areas of the far and near areas increase by 35.7% and 76.5%, respectively, and the maximum peripheral astigmatism increased from 0.75 to 1.5 ADD. The increasing maximum peripheral astigmatism will lengthen the period for the wearer to wear the PALs, and increase discomfort.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.