황반부 질환에 대한 유리체절제술 전후 레이저 간섭계와 초음파로 측정된 안축장 변화의 비교

Comparison of IOLMaster; and A-Scan Ultrasound: Change in Axial Length After Vitrectomy in Macular Disease

Purpose: To evaluate the differences between IOLMaster<sup>&#9415; and A-scans in changes in axial length after vitrectomy in patients with macular disease. Methods: Using IOLMaster<sup>&#9415; and A-scans, we measured preoperative and postoperative axial length in 12 eyes with epiretinal membranes (ERM) and in 8 eyes with macular holes (MH). The relationship between the absolute error in axial length after vitrectomy and both methods was assessed using Mann-Whitney U test. The correlation to central macular thickness was evaluated by Spearman’s correlation coefficient. Results: In eyes with ERM and MH, preoperative and postoperative axial lengths obtained with both methods had no significant difference (p >0.05). The absolute error in axial length after vitrectomy was not significant using IOLMaster<sup>&#9415; (ERM: 0.07±0.05 mm, MH: 0.04±0.02 mm, p >0.05) but was significant using A-scan (ERM: 0.20±0.11 mm, MH: 0.30±0.07 mm, p <0.05). The correlation between the change of axial length after vitrectomy and the central macular thickness was poor (IOLMaster<sup>&#9415;: ERM; correlation coefficient = -0.182, p >0.05, MH; correlation coefficient = -0.054, p >0.05, A-scan: ERM; correlation coefficient = -0.210, p >0.05, MH; correlation coefficient = -0.156, p >0.05). Conclusions: The IOLMaster<sup>&#9415; is more useful than the A-scan when measuring axial length without refractive errors after vitrectomy in eyes with macular disease.