In vivo quantitative meaurement of poterior capule opacification after extracapular cataract urgery Original Reearch Article

Purpoe: To introduce a new in vivo quantitative meaurement of poterior capule opacification (PCO) after extracapular cataract urgery and alo to analyze the correlation between opacification denity and the patient’ viual acuity. Method: Propectively, the opacification denity value in the central 3-mm portion of the poterior capule wa quantitated by mean of an area denitometry with the cheimpflug photography ytem (EA-1000). The EA-1000 examination wa performed on 40 eye with clinically ignificant PCO both before and after undergoing Nd:YAG laer poterior capulotomy, and on 10 eye without PCO. The correlation between the opacification denity value and the viual acuity wa analyzed with a linear regreion analyi. Reult: The mean opacification denity value ± D were 48.8 ± 29.5 computer-compatible tape (CCT) tep in the PCO group before capulotomy, 15.5 ± 7.8 CCT tep in the PCO group after capulotomy, and 12.9 ± 4.9 CCT tep in the non-PCO group. The mean opacification denity value in the PCO group before capulotomy wa ignificantly greater than that in the PCO group after capulotomy or than that of the non-PCO group. A linear regreion analyi determined that the opacification denity value alo correlated well with the viual acuity (R2 = .808). Concluion: We have etablihed a new in vivo quantitative meaurement of PCO. Becaue the opacification denity value obtained by thi meaurement correlated well with the patient’ viual acuity, we conider thi meaurement to be ueful in both the reearch and clinical management of PCO.