Results 211 to 220 of about 109,795 (255)
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Transition from a Thin Lens to a Thick Lens
20094.1 Introduction It was shown under Chapters 2 and 3 that the âthin lensâ concept is an extremely useful one for preliminary calculations and analysis as well as a general design tool. Determining the difference in performance between that fictitious thin lens and a realistic thick lens is an interesting exercise which confirms the statement ...
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Third-order aberration coefficients of a thick lens
Applied Optics, 2012In this paper, formulas are described for the calculation of the third-order aberration (Seidel) coefficients for a thick lens in air. The explicit analytic dependence of individual aberration coefficients on a lens thickness is presented. Such formulas make it possible to analyze an influence of the lens thickness on lens aberration properties and the
Antonin, Mikš, Jiří, Novák
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Refractions by a Thick Lens Which Is Equivalent to a Compound Lens System
American Journal of Physics, 1946Not ...
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Crystalline Lens Thickness Changes as Observed by Pachometry
Optometry and Vision Science, 1982Abstract Crystalline lens thickness was measured with a Haag‐Streit slitlamp biomicroscope no. 900 using a depth measuring attachment. Results indicate that relative lens thickness increases as a square function of age. Lens thickness was also measured during changes in the stimulus to accommodation.
C C, Dalziel, D J, Egan
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Journal of The British Contact Lens Association, 1986
Abstract Current textbooks describe how the edge thickness of a contact lens measured parallel to the axis ofsymmetry, maybe calculated. Equations have been published for calculation of radial edge thickness either along the front optic radius or along an extrapolation of the back optic radius.
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Abstract Current textbooks describe how the edge thickness of a contact lens measured parallel to the axis ofsymmetry, maybe calculated. Equations have been published for calculation of radial edge thickness either along the front optic radius or along an extrapolation of the back optic radius.
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A Satisfying “Thick Lens” Experiment
American Journal of Physics, 1957An elementary experiment is described in which an object-image relationship for a thick lens is determined both by experiment and by calculations involving easily determined lens parameters. The two methods have over-all errors of less than 6% and agree quite well.
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A Contact Lens Sagittal Height and Thickness Gauge
American journal of optometry and physiological optic, 1981Abstract An electronic gauge for measuring the sagittal height and thickness of hydrophilic lenses is described.
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Journal of Refractive Surgery, 2012
PURPOSE: To assess whether lens thickness derived from age should be used in intraocular lens (IOL) power calculation. METHODS: Ninety-three eyes underwent optical low coherence reflectometry (OLCR) prior to cataract surgery. Lens thickness (LT) by OLCR was used to calculate the IOL
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PURPOSE: To assess whether lens thickness derived from age should be used in intraocular lens (IOL) power calculation. METHODS: Ninety-three eyes underwent optical low coherence reflectometry (OLCR) prior to cataract surgery. Lens thickness (LT) by OLCR was used to calculate the IOL
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Lens thickness growth in humans
Clinical & Experimental Ophthalmology, 2013Robert C, Augusteyn +2 more
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Lens thickness growth in humans: response
Clinical & Experimental Ophthalmology, 2013Jost B, Jonas, Vinay, Nangia
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