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Erin M Rueff, Loraine T Sinnott, Melissa D Bailey, Peter Ewen King-Smith; The similarity between symptoms of binocular vision disorders and dry eye. Invest. Ophthalmol. Vis. Sci. 2014;55(13):1990.
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To determine if there is overlap between patient-reported symptoms for dry eye syndrome and patient-reported binocular vision disorder symptoms.
Subjects included 95 patients who were enrolled in a larger study of dry eye disease. All subjects completed both the Ocular Surface Disease Index (OSDI) and the Convergence Insufficiency Symptom Survey (CISS) at the same baseline visit. Overall symptom scores were calculated for both surveys and then a Spearman correlation coefficient was calculated to determine the relationship between individual responses to both surveys.
The mean ± SD age for all subjects was 51.3 ± 13.6 years. Out of the 95 subjects, 75 (79%) were female. The mean ± SD score on the CISS was 13.2 ± 8.7 (range: 0 to 33). The mean ± SD score on the OSDI was 16.2 ± 17.1 (range: 0.0 to 72.7). The correlation between the OSDI and the CISS in these subjects was r = 0.71, p < 0.0001.
Scores on the OSDI and the CISS were positively correlated. The results of this study suggest that symptoms related to dry eye and symptoms related to a binocular vision disorders can be very similar. These findings are important because many patients suffering from dry eye-like symptoms show few or no clinical signs of ocular surface damage. Studies of dry eye should consider screening potential subjects for binocular vision disorders.
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