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Near Point Of Fixation Disparity (NPFD) And It's Association With Concussive Injury.

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dc.contributor.author Szarkowski, Megan
dc.contributor.author Rossman, Angela
dc.date.accessioned 2015-08-19T14:45:44Z
dc.date.available 2015-08-19T14:45:44Z
dc.date.issued 2014-05-01
dc.identifier.uri http://hdl.handle.net/2323/5204
dc.description This paper is submitted in partial fulfillment of the requirements for the degree of Doctor of Optometry. 24 pages. en_US
dc.description.abstract Background: The Rinkside Concussion Investigator Group was formed to investigate the protocol for removing an athlete from play when a potentially concussive injury has occurred. The Near Point of Fixation Disparity (NPFD) test is an assessment that has shown promise in the area of concussion determination. This research was seeking to determine normative values for the NPFD test. It was designed to supplement ongoing investigations of the use of the NPFD test with the goal of determining if the test can be used for rink/sideline concussion screenings during sporting events. Methods: The NPFD test requires the subject to view a card with polarized nonius lines while wearing polarized glasses. While focusing on the central E target, the near point of fixation disparity card is moved slowly inward toward the subject's nose. As the target approaches the subject, they report when the vertical nonius lines become horizontally misaligned. The distance, measured from the spectacle plane to the card, at which this misalignment occurs indicates the NPFD breakpoint. As the target is moved back toward the start point, the distance at which the lines become re-aligned is recorded as the recovery point. Results: The goal of this study was to begin to establish a range of NPFD normal values. Studies have shown that a reduced near point of fixation disparity is associated with history of a concussion. The immediate effect of a concussion on near point of fixation disparity breakpoint and recovery has not yet been researched. Conclusions: Establishing normal findings for the NPFD test is an important step in determining if this test can be used on athletes who have had a suspected injury. This research and further research using this data will be beneficial to the sports community in providing a quick, easy and reliable assessment to make return-to-play decisions. en_US
dc.language.iso en_US en_US
dc.relation.ispartofseries UA 29;
dc.subject Jenerou, Alison. O.D. Faculty Advisor. en_US
dc.subject Near Point of Fixation Disparity Test (NPFD) en_US
dc.subject Concussions. en_US
dc.title Near Point Of Fixation Disparity (NPFD) And It's Association With Concussive Injury. en_US
dc.type Thesis en_US


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