title: High resolution ultrasonography in eyes with angle-closure glaucoma associated with the cicatricial stage of retinopathy of prematurity.
abstract: BACKGROUND
  Angle-closure glaucoma in children at the cicatricial stage of retinopathy of prematurity (ROP) has been thought to be caused by the anterior displacement of the lens-iris diaphragm resulting from contraction of a retrolental fibrous membrane. Other possible mechanisms include pupillary block and ciliary block.
  
  
  METHODS
  Three patients (three eyes) at the cicatricial stage of ROP with angle-closure glaucoma were examined by high-resolution ultrasonography before and after peripheral iridectomy.
  
  
  METHODS
  High-resolution ultrasonography preoperatively showed that the angle was closed. A retrolental fibrous membrane was attached behind the lens. After the iridectomy, ultrasonography showed an open angle, and the intraocular pressure was normal.
  
  
  CONCLUSIONS
  The angle closure in our three patients was caused mainly by a pupillary block and could be treated by peripheral iridectomy.
authors.affiliation: Department of Ophthalmology, Nagoya University School of Medicine, Aichi, Japan.
authors.forename: Atsuko
authors.initials: A
authors.lastname: Suzuki
authors.forename: Nagako
authors.initials: N
authors.lastname: Kondo
authors.forename: Hiroko
authors.initials: H
authors.lastname: Terasaki
mesh_terms: D000869:Anterior Eye Segment / Q000000981:diagnostic imaging*; D002924:Ciliary Body / Q000000981:diagnostic imaging*; D005865:Gestational Age; D015812:Glaucoma, Angle-Closure / Q000000981:diagnostic imaging* / Q000209:etiology / Q000601:surgery; D006801:Humans; D007231:Infant, Newborn; D019102:Infant, Very Low Birth Weight; D007429:Intraocular Pressure; D032801:Iridectomy; D007498:Iris / Q000000981:diagnostic imaging* / Q000601:surgery; D012178:Retinopathy of Prematurity / Q000150:complications / Q000000981:diagnostic imaging*; D014463:Ultrasonography