Power Profiles and In Vitro Optical Quality of Scleral Contact Lenses: Effect of the Aperture and Power
Autor: | José J. Esteve-Taboada, Alberto Recchioni, Rune Brautaset, Alberto Domínguez-Vicent |
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Rok vydání: | 2018 |
Předmět: |
Optics and Photonics
Materials science Contact Lenses Aperture Physics::Optics Optical power Astrophysics::Cosmology and Extragalactic Astrophysics In Vitro Techniques Refraction Ocular law.invention 03 medical and health sciences 0302 clinical medicine Optics law Optical transfer function Humans Dioptre Analysis of Variance business.industry Lens speed Equipment Design Lens (optics) Contact lens Ophthalmology 030221 ophthalmology & optometry Gradient-index optics business 030217 neurology & neurosurgery |
Zdroj: | Eye & Contact Lens: Science & Clinical Practice. 44:149-158 |
ISSN: | 1542-2321 |
DOI: | 10.1097/icl.0000000000000345 |
Popis: | To assess the power profile and in vitro optical quality of scleral contact lenses with different powers as a function of the optical aperture. The mini and semiscleral contact lenses (Procornea) were measured for five powers per design. The NIMO TR-1504 (Lambda-X) was used to assess the power profile and Zernike coefficients of each contact lens. Ten measurements per lens were taken at 3- and 6-mm apertures. Furthermore, the optical quality of each lens was described in Zernike coefficients, modulation transfer function, and point spread function (PSF). A convolution of each lens PSF with an eye-chart image was also computed. The optical power fluctuated less than 0.5 diopters (D) along the optical zone of each lens. However, the optical power obtained for some lenses did not match with its corresponding nominal one, the maximum difference being 0.5 D. In optical quality, small differences were obtained among all lenses within the same design. Although significant differences were obtained among lenses (P |
Databáze: | OpenAIRE |
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