EARLY DIAGNOSIS OF MACULAR HOLE CLOSURE OF A GAS-FILLED EYE WITH WATZKE–ALLEN SLIT BEAM TEST AND SPECTRAL DOMAIN OPTICAL COHERENCE TOMOGRAPHY


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Abstract

Purpose:The purpose of this study was to evaluate the usefulness of the Watzke–Allen slit beam test (W/A test) and spectral domain optical coherence tomography (SD-OCT) for diagnosing macular hole closure in gas-filled eyes during the early postoperative period.Methods:A retrospective comparative study was performed on 40 consecutive eyes of 40 patients with macular hole treated with vitrectomy. Macular hole closure was initially judged within 2 days after surgery with both the W/A test and SD-OCT. Final diagnosis was confirmed with SD-OCT after the gas disappeared. The concordance rate of initial diagnosis and final diagnosis using each method was evaluated.Results:The W/A test could be done for the gas-filled eyes of all patients next day, whereas a diagnosable SD-OCT image could be obtained in 77.5% of patients. The concordance rate was 85% (34of 40 examined eyes) with the W/A test and 77.5% (31 of 40 examined eyes) with SD-OCT (P = 0.39, chi-square test). If a diagnosable result (image or response) could be obtained within 2 days after surgery, the accuracy of SD-OCT (31 of 31 eyes) was significantly better than that of the W/A test (31 of 40 eyes) (P = 0.026, chi-square test).Conclusion:The W/A test is more useful for diagnosing macular hole closure of a gas-filled eye than SD-OCT; however, SD-OCT gives more accurate information when diagnosable. Combining both methods could improve the accuracy and applicability.

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