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Förhållande mellan fixationsdisparitet och dissocierad fori
Linnaeus University, Faculty of Health and Life Sciences, Department of Medicine and Optometry.
2017 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [sv]

Syfte: Studiens syfte var att ta reda på om det finns någon korrelation mellan fixationsdisparitet och dissocierad fori på nära håll samt deras korrelation till symtom.

 

Metod: Mätningarna utfördes på totalt 57 personer mellan 12-45 år. De deltagare som hade någon form av tropi eller ett stereoseende sämre än 100 bågsekunder uteslöts. Mätningarna utfördes på 40 cm avstånd och för att mäta den dissocierade forin användes Modifierad Thorington. För att mäta fixationsdispariteten användes Saladin kort. Deltagarna fick fylla i en symtomenkät som bestod av 15 frågor och med hjälp av denna kunde man avgöra om deltagarna var symtomatiska eller ej.

 

Resultat: Det fanns en svag men positiv statistisk signifikant korrelation mellan fixationsdisparitet och dissocierad fori (r = 0,35; p <0,001). Två av deltagarna hade motsatt riktning på den dissocierade forin och fixationsdispariteten, dessa hade exofori med eso fixationsdisparitet. Varken forier eller fixationsdisparitet hade någon korrelation till symtom, men deltagarna med en högre poäng på symtomenkäten hade exofori.

 

Slutsats: Det finns en svag positiv korrelation mellan dissocierad fori och fixationsdisparitet. Det kunde inte hittas någon korrelation mellan fixationsdisparitet och symtom eller mellan forier och symtom, detta kan bero på att en grupp som var relativt asymtomatisk undersöktes.

Abstract [en]

The aim of this study was to investigate if there is any correlation between fixation disparity and dissociated phoria at near. Additionally a second aim was to evaluate if correlation between symptom questionnaire (CISS), dissociated phoria and fixation disparity exists.

 

The measurements were performed on a total of 57 people between the ages of 12-45 years old. The participants with any tropia and stereopsis less than 100 sec of arc were excluded. A subjective refraction was performed to make sure that the subjects were fully corrected. Modified Thorington was used to measure the dissociated phoria and the fixation disparity was measured with a Saladin card. All measurements were performed at a distance of 40 cm. To evaluate subject’s symptoms, a symptom questionnaire (CISS) with 15 questions was used.

 

A regression analysis showed a weak but statistically significant positive correlation between dissociated phoria and fixation disparity (r = 0.35; p <0.001). Two of the participants had a opposite direction on the dissociated phoria and the fixation disparity, they had exophoria and eso fixation disparity. Neither dissociated phorias or fixation disparity were correlated to symptoms. The subjects with higher points on the symptom questionnaire were shown to have exophoria.

 

There was a weak positive correlation between dissociated phoria and fixation disparity at near. A similar correlation between fixation disparity and symptoms could not be found, between neither dissociated phoria and symptoms or fixation disparity and symptoms. This could be because a relatively asymptomatic group was examined. 

Place, publisher, year, edition, pages
2017. , p. 21
Keywords [sv]
Fixationsdisparitet, dissocierad fori, binokulärseende, CISS
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:lnu:diva-65492OAI: oai:DiVA.org:lnu-65492DiVA, id: diva2:1111092
Educational program
Optometry Programme, 180 credits
Supervisors
Examiners
Available from: 2017-06-29 Created: 2017-06-17 Last updated: 2017-06-29Bibliographically approved

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