J Korean Ophthalmol Soc > Volume 56(5); 2015 > Article
Journal of the Korean Ophthalmological Society 2015;56(5):702-708.
DOI: https://doi.org/10.3341/jkos.2015.56.5.702    Published online May 15, 2015.
Internal Lens Signal Measured by Dual Scheimpflug Anterior Segment Analyzer.
Jin Woo Ro, Ka Young Yi, Ha Kyung Kim, Joon Young Hyon, Won Ryang Wee, Young Joo Shin
1Department of Ophthalmology, Hallym University College of Medicine, Chuncheon, Korea. schinn@daum.net
2Department of Ophthalmology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
3Department of Ophthalmology, Seoul National University College of Medicine, Seoul, Korea.
백내장 수술 전후 이중샤임플러그 전안부 분석기로 측정한 수정체 내부 신호강도
한림대학교 의과대학 안과학교실1, 서울대학교 의과대학 분당서울대학교병원 안과학교실2, 서울대학교 의과대학 안과학교실3
To investigate the clinical significance of the internal lens signal measured using dual Scheimpflug anterior segment analyzer (Galilei(TM), Ziemer, Switzerland) in patients receiving cataract surgery. METHODS: The present study included 151 eyes of 148 patients who received surgery for senile cataracts from February 2012 to January 2013. Preoperative internal lens signals were measured preoperatively. The depth of anterior chamber and anterior angles were measured using dual Scheimpflug anterior segment analyzer preoperatively and 1 month postoperatively. Preoperative and postoperative best-corrected visual acuities (BCVAs) were measured. The relationships between preoperative internal lens signal and the changes in BCVA or anterior angles were evaluated. RESULTS: Internal lens signal and preoperative BCVA (log MAR) or preoperative anterior chamber depth were highly correlated (r = 0.287, p = 0.001 and r = -0.271, p = 0.004, respectively). Anterior angles increased 1 month after surgery compared with the preoperative values (p < 0.001). The amount of change between preoperative and postoperative anterior angles correlated with preoperative anterior angles (p < 0.001). However, no statistically significant correlation was observed between internal lens signal and preoperative anterior angles or postoperative BCVA. Internal lens signal correlated with changes in postoperative anterior angles (p < 0.001). CONCLUSIONS: Internal lens signal correlated with preoperative visual acuity and may help evaluate the cataract severity quantitatively and objectively. Internal lens signal may aid in understanding the structure of anterior segments by predicting the lens volume. Knowing the effect of visual impairment due to cataracts and predicting visual improvement after cataract surgery is necessary.
Key Words: Cataract surgery;Dual Scheimpflug anterior segment analyzer;Internal lens signal;Visual acuity

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