Microscopes

Malacara-Hernández, Daniel; Malacara-Hernández, Zacarías

doi:10.1201/b13894-16

Cited by 2 publications

(2 citation statements)

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“…For meridional rays, equation (6) directly reduces to equation (5); for skew rays, equation (6) also expresses the belonging of the refracted ray ¢  r to the incidence plane defined by rˆand a ˆ. Converting equation (6) to a set of algebraic equations and solving for ¢  r implies a simple but somewhat lengthy computation, and is here deferred to the literature [18][19][20][21][22][23]. Besides, there are several commercially available programs that provide appropriate means to trace rays through optical systems in general, allowing to deal with a number of lenses, mirrors, diffractive optics and more.…”

Section: Tracing Rays Through the Outer Slope Of A Surface Bubblementioning

confidence: 99%

Optical behavior of surface bubbles

2015

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The observation of diamond-like light spots produced by surface bubbles obliquely illuminated is reported. The phenomenon is discussed in terms of geometrical optics, and an explanation is provided attributing the effect to the astigmatism introduced by the deformation of the liquid surface surrounding the bubble. An essential ray tracing program is outlined and used to reconstruct the observed phenomenon numerically.

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Section: Tracing Rays Through the Outer Slope Of A Surface Bubblementioning

confidence: 99%

Optical behavior of surface bubbles

2015

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“…When using a manual phoropter, rotating banks of lenses present prescription combinations 2 . These practices stack lenses with multiple lens surfaces, which reduces the optical quality 3–5 for the patient.…”

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confidence: 99%

Clinical Comparison of High-Resolution and Standard Refractions and Prescriptions

Meyer,

Rickert,

Reed

et al. 2023

Optom Vis Sci

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Significance Recently, novel refraction and lens manufacturing technology claims to provide more efficient, higher-resolution refractions and resulting lenses. It is unclear, however, if these benefits are realized and appreciated by the patient. Purpose This study investigated benefits and drawbacks of high-resolution refraction technology over standard, specifically in terms of the refraction, glasses prescription, and participant’s perceptions of the technology. Methods Sixty progressive addition lens (PAL) wearers (aged 35-70) and 60 single-vision (SV) wearers (age 18+) were randomized to a high-resolution refraction (Vision-R 800, essilorinstrumentsusa.com) and standard refraction in a 2-week crossover dispensing design. Refractive results were converted to M, J0 and J45 and analyzed using multivariate t-tests. Bayesian estimation was used to analyze differences between refraction type and age group for subjective outcomes. Results Differences in refractive error between the two refractions were small and none differed statistically (P value > .05) or clinically (e.g., <0.25D) in either subgroup. Visual acuities at distance and near were better than 0.00 logMAR; none of the mean differences between the refractions reached statistical or clinical (e.g., <0.25D) significance. Participants significantly preferred the high-resolution refraction for its quickness and efficiency, improved comfort, and less stress. Bayesian analysis indicated a 76% probability that participants had higher confidence in the high-resolution refraction, 93% probability they would seek it out for their care, and 94% probability they would recommend an optometrist using this technology. Conclusions Refractive and acuity endpoints were similar with the high-resolution and standard refraction. Participants, however, perceived several key benefits of the high-resolution refraction and prescription for their care, the care of their friends/family, and the practice itself.

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Microscopes

Cited by 2 publications

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Optical behavior of surface bubbles

Optical behavior of surface bubbles

Clinical Comparison of High-Resolution and Standard Refractions and Prescriptions

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