超音波生体顕微鏡（UBM）を用いた未熟児眼毛様体長の生体計測

Biometry of the ciliary body in premature eyes using ultrasound biomicroscope

　超音波生体顕微鏡（ハンフリー社製UBM−840）を用いて，修正週数40週前後の未熟児78眼を対象として毛様体長を生体計測した。その結果鼻側毛様体長は，満期産児（生後1〜5週）で3.01±0.45mm，未熟児網膜症の発症していない未熟児（修正週数36〜53週）で3.11±0.49mm，未熟児網膜症の発症した未熟児（修正週数38〜52週）では2.94±0.38mmであった。網膜症発症児は，非発症児の鼻側毛様体長に比べ有意に短かった。また満期産児の耳側毛様体長は3.38±0.17mmで，鼻側毛様体長の2.97±0.22mmに比べ有意に長かった。その他は，統計学的に有意差はなかった。

We measured the length of the ciliary body in 78 eyes of premature babies at the mean gestational age of 41 weeks. Another series of 18 full-term newborn babies served as control. An ultrasonic biomicroscope, UBM, was used in the measurement. The distance between the iridocorneal angle to the ora serrata was defined as the length of the ciliary body. In full-term infants, the length averaged 2.97±0.22mm in the nasal and 3.38±0.17mm in the temporal horizontal line. The difference was not significant. In 46 eyes of premature infants without retinopathy, the value averaged 3.11±0.49mm and did not differ from the value in full-term babies. In 14 eyes of premature infants which underwent therapeutic photocoagulation, the length of the ciliary body in the nasal horizontal line was significantly less than in premature infants without retinopathy.