lnu.sePublikasjoner
Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Fixation in Patients with Juvenile Macular Disease
University of Minho, Portugal.ORCID-id: 0000-0003-3436-2010
University of Minho, Portugal.
University of Porto, Portugal.
University of Porto, Portugal.
2007 (engelsk)Inngår i: Optometry and Vision Science, ISSN 1040-5488, E-ISSN 1538-9235, Vol. 84, nr 9, s. 852-858Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Purpose. The instability of fixation with central scotoma has been mainly studied in patients with age-related macular diseases (MDs). However, early macular lesions can lead to different characteristics of fixation. The aim of this work was to study fixation in patients with juvenile MD.

Methods. Eye movements of 10 patients and 10 controls were monitored during fixation. Visual fields were assessed by static perimetry to determine the extent of the field defects. Eye movements were separated into saccades and drifts, with fixation stability assessed by bivariate contour ellipse area (BCEA). To quantify the number and location of preferred retinal loci (PRL), the kernel density estimator and expectation maximization for mixtures of gaussians were used.

Results. Patients have worse fixation stability than controls and large BCEAs resulted in more than one PRL. It was found that central field defects (10°) have negative correlation with the size of BCEA. In addition, the meridian of saccades during fixation was correlated with the meridian inter-PRL.

Conclusions. Patients with juvenile MDs have large BCEAs, frequently associated with two PRL. Similar results had been found for patients with age-related MDs. Also, the meridian of involuntary saccades during fixation was found to be correlated with the location of PRLs, suggesting a useful role of these movements in alternating between them.

sted, utgiver, år, opplag, sider
2007. Vol. 84, nr 9, s. 852-858
Emneord [en]
fixation stability, preferred retinal locus, eccentric fixation, eye movements
HSV kategori
Forskningsprogram
Naturvetenskap, Optometri
Identifikatorer
URN: urn:nbn:se:lnu:diva-68118DOI: 10.1097/OPX.0b013e3181559bebOAI: oai:DiVA.org:lnu-68118DiVA, id: diva2:1145300
Tilgjengelig fra: 2017-09-28 Laget: 2017-09-28 Sist oppdatert: 2017-09-29bibliografisk kontrollert

Open Access i DiVA

fulltext(984 kB)75 nedlastinger
Filinformasjon
Fil FULLTEXT01.pdfFilstørrelse 984 kBChecksum SHA-512
24056d042b59410aa440baf06e23bd40c6093e1771103ebbfaf890174780fb6ee5682d3d7bb1e44fb4167168b75b289ee277a56d92cdd5f1dd4198058a18bd63
Type fulltextMimetype application/pdf

Andre lenker

Forlagets fulltekst

Personposter BETA

Macedo, António Filipe

Søk i DiVA

Av forfatter/redaktør
Macedo, António Filipe
I samme tidsskrift
Optometry and Vision Science

Søk utenfor DiVA

GoogleGoogle Scholar
Totalt: 75 nedlastinger
Antall nedlastinger er summen av alle nedlastinger av alle fulltekster. Det kan for eksempel være tidligere versjoner som er ikke lenger tilgjengelige

doi
urn-nbn

Altmetric

doi
urn-nbn
Totalt: 120 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf