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https://hdl.handle.net/1822/57813
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Campo DC | Valor | Idioma |
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dc.contributor.author | Sousa, Ana Isabel Carvalho Amorim | por |
dc.contributor.author | Araújo, Rute Juliana Ferreira Macedo | por |
dc.contributor.author | Fernandes, Paulo RB | por |
dc.contributor.author | Queirós, A. | por |
dc.contributor.author | González-Méijome, José Manuel | por |
dc.date.accessioned | 2019-01-04T14:18:28Z | - |
dc.date.available | 2019-01-04T14:18:28Z | - |
dc.date.issued | 2019 | - |
dc.identifier.citation | Amorim-de-Sousa, Ana; Macedo-Araújo, Rute; Fernandes, Paulo; Queirós, António; González-Méijome, JM. Impact of defocus and high-order aberrations on light distortion measurements, Journal of Ophthalmology, 2019, 2874036, 1-8, 2019. | por |
dc.identifier.issn | 2090-004X | por |
dc.identifier.uri | https://hdl.handle.net/1822/57813 | - |
dc.description.abstract | Purpose. To evaluate the impact of different levels of positive and negative defocus on light disturbance (LD) measures and to understand how high-order aberrations (HOAs) and topographic quality parameters may influence the perception of photic phenomena. Methods. Thirty young healthy subjects (21 females and 9 males) attended this cross-sectional study. LD was evaluated with the light distortion analyzer (LDA) in natural accommodative and cycloplegic conditions with positive and negative induced defocus of 1.00D. HOAs were taken for a natural mesopic (without cycloplegia) and for fixed 5mm (with cycloplegia) pupil size. The impact of corneal morphological parameters (SAI, SRI, and Q-value) in LD was also investigated. Results. Positive and negative induced defocus of 1.00D significantly increased the size of LD (p<0.010, Wilcoxon signed rank test) but not its irregularity index. Spherical-like HOAs were associated with the size of LD, while coma-like and total-like HOAs were associated with LD irregularity. Our results showed that SRI was significantly correlated with the size of the disturbance area (r=0.519, p=0.003, Spearman correlation) and SAI with both size (r=0.502, p=0.005, Spearman correlation) and irregularity (r=0.371, p=0.044, Spearman correlation). However, no correlation between the Q-value and LD parameters was found. Conclusions. The uncorrected positive and negative refractive errors might increase the size of the LD, such as the spherical-like HOAs, SAI, and SRI, instead of asphericity. Coma-like and total-like HOAs and SAI may influence the perception of irregularities in the LD shape. These results might have an impact on postrefractive surgery visual performance that should be investigated. | por |
dc.description.sponsorship | This work was partially supported by the Portuguese Foundation for Science and Technology (FCT) in the framework of projects PTDC/SAU-BEB/098391/2008, PTDC/SAU-BEB/098392/2008, and the Strategic Funding UID/FIS/04650/2013. | por |
dc.language.iso | eng | por |
dc.publisher | Hindawi Publishing Corporation | por |
dc.relation | info:eu-repo/grantAgreement/FCT/5876-PPCDTI/98391/PT | - |
dc.relation | info:eu-repo/grantAgreement/FCT/5876-PPCDTI/98392/PT | - |
dc.relation | info:eu-repo/grantAgreement/FCT/5876/147414/PT | - |
dc.rights | openAccess | por |
dc.title | Impact of defocus and high-order aberrations on light distortion measurements | por |
dc.type | article | - |
dc.peerreviewed | yes | por |
oaire.citationVolume | 2019 | por |
dc.date.updated | 2019-01-04T12:48:25Z | - |
dc.identifier.doi | 10.1155/2019/2874036 | por |
dc.description.publicationversion | info:eu-repo/semantics/publishedVersion | por |
dc.subject.wos | Science & Technology | por |
sdum.journal | Journal of Ophthalmology | por |
Aparece nas coleções: | ASSESSMENT AND ENHANCING VISUAL PERFORMANCE (2018 - ...) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Impact of Defocus and High-Order Aberrations on Light disturbance measurements.pdf | 3,18 MB | Adobe PDF | Ver/Abrir |