Heterophoria: Vergence stability and visual acuity after asymmetric saccades

Journal of Eye Movement Research

Oliver Ehrt¹  Thomas Eggert¹  Alexander Bickmann¹  Andreas Straube¹  Daniel Kirchhoff¹  Bernhard M. Blum¹ 

[1] Ludwig-Maximilians University Munich;

关键词: heterophoria;    vergence;    asymmetric saccades;    eye movements;    visual acuity;   

DOI  :  10.16910/jemr.5.5.4

来源: DOAJ

【 摘 要 】

Many patients with heterophoria report on symptoms related to impaired vision. To investigate whether these symptoms are provoked by saccades this study examines whether in heterophoria effects on intrasaccadic and postsaccadic vergence movements are linked to effects on visual performance. Visual acuity was measured in 35 healthy subjects during fixation and immediately after asymmetric diverging saccades. Binocular position traces were recorded by video-oculography. Subjects with exophoria showed larger intrasaccadic divergence amplitudes, which in turn led to smaller postsaccadic divergence amplitudes. Visual acuity did not depend on heterophoria or vergence amplitudes. The results suggest that compensating for exophoria requires increased convergence activity as compared to orthophoria or compensated esophoria. Visual acuity seemed relatively robust with respect to postsaccadic vergence movements.

【 授权许可】

Unknown