Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/107699
Title: | Optical Properties Influence Visual Cortical Functional Resolution After Cataract Surgery and Both Dissociate From Subjectively Perceived Quality of Vision | Authors: | Miranda, Ângela Sofia Cardoso Rosa, Andreia de Faria Martins Dias, Miguel José Patrício Harvey, Ben M. Silva, Maria Fátima Loureiro da Castelo-Branco, Miguel de Sá e Sousa Murta, Joaquim Carlos Neto |
Keywords: | quality of vision; fMRI; population receptive fields; dysphotic symptoms; visual cortical processing | Issue Date: | 1-Feb-2018 | Publisher: | Association for Research in Vision and Ophthalmology | Project: | info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID/NEU/04539/2013/PT CENTRO-01-0145-FEDER-000016 |
Serial title, monograph or event: | Investigative Ophthalmology and Visual Science | Volume: | 59 | Issue: | 2 | Abstract: | PURPOSE. To investigate the relation between optical properties, population receptive fields (pRFs), visual function, and subjectively perceived quality of vision after cataract surgery. METHODS. The study includes 30 patients who had recently undergone bilateral sequential cataract surgery. We used functional magnetic resonance imaging and pRF modelling methods to assess pRF sizes across visual cortical regions (V1–V3). Subjects also performed a complete ophthalmologic and psychophysical examination and answered a quality of vision questionnaire. RESULTS. Subjects with worse optical properties had, as predicted, larger pRF sizes. In addition, analysis in the primary visual cortex revealed significantly larger mean pRF sizes for operated subjects with worse contrast sensitivity (P ¼ 0.038). In contrast, patients who scored high in the subjective ‘‘bothersome’’ dimension induced by dysphotic symptoms had surprisingly lower pRF size fitting interception (P ¼ 0.012) and pRF size fitting slopes (P ¼ 0.020), suggesting a dissociation between objective quality of vision and subjective appraisal. CONCLUSIONS. Optical properties of the eye influence pRF size. In particular, visual aberrations have a negative impact on visual cortical processing. A novel dissociation between subjective reports of quality of vision and pRF sizes was further identified. This suggests that patients with better cortical resolution may have a negative subjective response possibly because of improved perception of dysphotic phenomena. pRF properties represent a valuable quantitative measure to objectively evaluate quality of vision but do not necessarily predict subjective complaints. | URI: | https://hdl.handle.net/10316/107699 | ISSN: | 1552-5783 | DOI: | 10.1167/iovs.17-22321 | Rights: | openAccess |
Appears in Collections: | FMUC Medicina - Artigos em Revistas Internacionais I&D ICNAS - Artigos em Revistas Internacionais I&D IBILI - Artigos em Revistas Internacionais |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Optical Properties Influence Visual Cortical Functional Resolution After Cataract Surgery and Both Dissociate From Subjectively Perceived Quality of Vision.pdf | 694.55 kB | Adobe PDF | View/Open |
Page view(s)
123
checked on Oct 2, 2024
Download(s)
66
checked on Oct 2, 2024
Google ScholarTM
Check
Altmetric
Altmetric
This item is licensed under a Creative Commons License