Intraocular lens far peripheral vision: image detail and negative dysphotopsia.

Journal of Cataract and Refractive Surgery
Michael J Simpson

Abstract

To evaluate negative dysphotopsia in the far periphery of the pseudophakic eye by generating simulated images of text charts. Consultancy. Laboratory study. Simulated images of a peripheral text chart were created using a ray-trace model of a pseudophakic eye. The point spread function varies strongly with a radial location. Retinal angles subtended at the second nodal point were used to linearly scale retinal locations to a polar plot in object space, weighting rays by the object luminance, the total transmittance, and a cosine normalization for pupil effects. Improved scaling using a phakic 70-year-old eye was also explored. Images demonstrate a distinct shadow with a 2.5 mm pupil between the upper limit of the text image formed by the intraocular lens (IOL) and a second larger image due to light missing the IOL. The shadow is rapidly softened by a small increase in pupil diameter. The images verified characteristics that previously were only inferred indirectly: (1) With a 2.5 mm pupil, there is a prominent dark shadow. (2) Light missing the IOL experiences lower power and forms a larger image and also comes from a lower visual angle. (3) A small increase in pupil diameter causes the shadow to fade. The calculations showed t...Continue Reading

References

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Aug 25, 2017·Klinische Monatsblätter für Augenheilkunde·Martin WenzelTimo Eppig
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Mar 6, 2018·Journal of Cataract and Refractive Surgery·Samuel MasketDon Pham
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Mar 29, 2018·Journal of Cataract and Refractive Surgery·Samuel Masket
Apr 25, 2018·Journal of Cataract and Refractive Surgery·Michael J Simpson, Maria Muzyka-Woźniak
Nov 22, 2018·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·M Nadeem AkramKarthikeyan Baskaran
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Feb 2, 2019·Journal of Cataract and Refractive Surgery·Samuel MasketNicole R Fram
May 3, 2019·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Michael J Simpson
Jul 22, 2019·Journal of Cataract and Refractive Surgery·Jay C ErieMark H Bandhauer

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Citations

May 18, 2020·Investigative Ophthalmology & Visual Science·Viswanathan RamasubramanianArthur Bradley
Apr 27, 2021·Journal of Cataract and Refractive Surgery·Luc van VughtGregorius P M Luyten
Jul 23, 2021·Journal of Cataract and Refractive Surgery·David L Cooke

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