Correlation between Worth Four Dot Test Results and Fusional Control in Intermittent Exotropia

• Main Authors: Mohammad Etezad Razavi, Marzieh Najaran, Raheleh Moravvej, Mohammad-Reza Ansari Astaneh, Abbas Azimi
• Format: Article
• Language: English
• Published: Knowledge E 2012-01-01
• Series: Journal of Ophthalmic & Vision Research
• Subjects: Intermittent Exotropia; Fusion; Worth Four Dot Test
• Online Access: http://www.jovr.org/article.asp?issn=2008-322X;year=2012;volume=7;issue=2;spage=134;epage=138;aulast=Razavi
• ISSN: 2008-322X

Purpose: To compare the results of Worth 4-dot test (WFDT) performed in dark and light, and at different distances, with fusional control in patients with intermittent exotropia (IXT). Methods: Dark and light WFDT was performed for new IXT subjects at different distances and the results were compared with level of office-based fusional control. Results: Fifty IXT patients including 17 male and 33 female subjects participated in the study. A significant difference (P<0.05) was observed between levels of home and office-based fusional control (P<0.05). A weak correlation was present between the results of WFDT and level of office-based fusional control; the highest agreement (Kappa=0.088) was observed with dark WFDT performed at a distance of 4m. Conclusion: Evaluation of fusional state by far WFDT, especially in a dark room, shows modest correlation with office-based fusional control in IXT patients and can be used as an adjunct to more complex tests such as far stereoacuity.