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Is the Memory Effect of the Blind Spot Involved in Negative Dysphotopsia after Cataract Surgery?
We present novel clinical observations on negative dysphotopsia (ND) in eyes that have undergone cataract surgery. In the past, shadow effects were alleged to be located in the far peripheral temporal visual field 50° to 100° away from the optical axis. In a small series of eight patients we found e...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Hindawi Publishing Corporation
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4575743/ https://www.ncbi.nlm.nih.gov/pubmed/26425353 http://dx.doi.org/10.1155/2015/786579 |
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author | Wenzel, Martin Menapace, Rupert Eppig, Timo Langenbucher, Achim |
author_facet | Wenzel, Martin Menapace, Rupert Eppig, Timo Langenbucher, Achim |
author_sort | Wenzel, Martin |
collection | PubMed |
description | We present novel clinical observations on negative dysphotopsia (ND) in eyes that have undergone cataract surgery. In the past, shadow effects were alleged to be located in the far peripheral temporal visual field 50° to 100° away from the optical axis. In a small series of eight patients we found evidence of photic effects, described by the patients as shadows in the periphery that were objectively located much more centrally. In all cases, we could find an association of these phenomena with the blind spot. We hypothesize that the memory effect of the blind spot which is dislocated and changed in magnification due to replacement of the crystalline lens could be one determinant for pseudophakic ND. The scotoma of the optic nerve head and the main arteries and veins of the phakic eye are displaced in the pseudophakic eye depending on the specific characteristics and position of the intraocular lens within the eye. |
format | Online Article Text |
id | pubmed-4575743 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Hindawi Publishing Corporation |
record_format | MEDLINE/PubMed |
spelling | pubmed-45757432015-09-30 Is the Memory Effect of the Blind Spot Involved in Negative Dysphotopsia after Cataract Surgery? Wenzel, Martin Menapace, Rupert Eppig, Timo Langenbucher, Achim J Ophthalmol Clinical Study We present novel clinical observations on negative dysphotopsia (ND) in eyes that have undergone cataract surgery. In the past, shadow effects were alleged to be located in the far peripheral temporal visual field 50° to 100° away from the optical axis. In a small series of eight patients we found evidence of photic effects, described by the patients as shadows in the periphery that were objectively located much more centrally. In all cases, we could find an association of these phenomena with the blind spot. We hypothesize that the memory effect of the blind spot which is dislocated and changed in magnification due to replacement of the crystalline lens could be one determinant for pseudophakic ND. The scotoma of the optic nerve head and the main arteries and veins of the phakic eye are displaced in the pseudophakic eye depending on the specific characteristics and position of the intraocular lens within the eye. Hindawi Publishing Corporation 2015 2015-09-06 /pmc/articles/PMC4575743/ /pubmed/26425353 http://dx.doi.org/10.1155/2015/786579 Text en Copyright © 2015 Martin Wenzel et al. https://creativecommons.org/licenses/by/3.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Clinical Study Wenzel, Martin Menapace, Rupert Eppig, Timo Langenbucher, Achim Is the Memory Effect of the Blind Spot Involved in Negative Dysphotopsia after Cataract Surgery? |
title | Is the Memory Effect of the Blind Spot Involved in Negative Dysphotopsia after Cataract Surgery? |
title_full | Is the Memory Effect of the Blind Spot Involved in Negative Dysphotopsia after Cataract Surgery? |
title_fullStr | Is the Memory Effect of the Blind Spot Involved in Negative Dysphotopsia after Cataract Surgery? |
title_full_unstemmed | Is the Memory Effect of the Blind Spot Involved in Negative Dysphotopsia after Cataract Surgery? |
title_short | Is the Memory Effect of the Blind Spot Involved in Negative Dysphotopsia after Cataract Surgery? |
title_sort | is the memory effect of the blind spot involved in negative dysphotopsia after cataract surgery? |
topic | Clinical Study |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4575743/ https://www.ncbi.nlm.nih.gov/pubmed/26425353 http://dx.doi.org/10.1155/2015/786579 |
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