| Comparison of IOLMaster(R) and A-Scan Ultrasound: Change in Axial Length After Vitrectomy in Macular Disease. |
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Seung Won Lee, Young Gun Kim, Seung Jun Lee, Do Kyun Kim, Hyung Woo Kwak, Seung Young Yu |
1Department of Ophthalmology, KyungHee University, School of Medicine, Seoul, Korea. syyu@khu.ac.kr
2Department of Ophthalmology, Kangwon National University, College of Medicine, Chuncheon, Korea.
3Department of Ophthalmology, Myugji Hospital, Goyang, Korea. |
| 황반부 질환에 대한 유리체절제술 전후 레이저 간섭계와 초음파로 측정된 안축장 변화의 비교 |
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이승원1 ㆍ김영균1 ㆍ이승준2 ㆍ김도균3 ㆍ곽형우1 ㆍ유승영1 |
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Department of Ophthalmology, KyungHee University, School of Medicine1 , Seoul, Korea / Department of Ophthalmology, Kangwon National University, College of Medicine2 , Chuncheon, Korea / Department of Ophthalmology, Myugji Hospital3 , Goyang, Korea |
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| Abstract |
PURPOSE
To evaluate the differences between IOLMaster(R) and A-scans in changes in axial length after vitrectomy in patients with macular disease. METHODS: Using IOLMaster(R) 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(R) (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(R): 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(R) is more useful than the A-scan when measuring axial length without refractive errors after vitrectomy in eyes with macular disease. |
| Key Words:
A-scan;Axial length;Central macular thickness;IOLMaster(R);Vitrectomy |
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