title: The role of preoperative ultrasonography for patients with dense cataract: a retrospective study of 509 cases.
abstract: OBJECTIVE
  Ocular ultrasonography is widely used for the evaluation of eyes with opaque ocular media. Although preoperative ultrasonography of the globe has been recommended for patients with dense cataracts, the value of such an examination is currently unknown. The purpose of this study was to evaluate the prevalence and nature of intraocular pathologies detected by preoperative ultrasound examination in patients with dense cataract.
  
  
  METHODS
  The authors retrospectively studied 509 patients referred for routine ultrasound examination of the globe due to dense cataract. Exclusion criteria included known posterior segment pathology, previous ocular surgery or penetrating trauma, and age of younger than 18 years. All the patients underwent ultrasound examination by B-scan and standardized A-scan.
  
  
  RESULTS
  In 19.6% of the patients, a posterior segment pathology was revealed by the ultrasound examination. The most frequently disclosed abnormalities were posterior staphyloma (7.2%), retinal detachment (4.5%), and vitreous hemorrhage (2.5%). One patient with a large choroidal malignant melanoma was identified. The prevalence of posterior segment pathologies was slightly higher in patients with a history of ocular trauma, compared with the nontraumatic cataract group (29.6% versus 19.0%, respectively; P = .1). The prevalence of retinal detachment was increased in the traumatic cataract subgroup (14.8% compared with 3.9%), but this difference did not reach statistical significance.
  
  
  CONCLUSIONS
  Preoperative ultrasound examination for patients with dense cataract can be used to detect pathologies that may influence the surgical strategy and the postoperative visual prognosis.
authors.affiliation: Department of Ophthalmology, Hadassah University Hospital, Jerusalem, Israel.
authors.forename: I I
authors.initials: II
authors.lastname: Anteby
authors.forename: E Z
authors.initials: EZ
authors.lastname: Blumenthal
authors.forename: E
authors.initials: E
authors.lastname: Zamir
authors.forename: P
authors.initials: P
authors.lastname: Waindim
mesh_terms: D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D002386:Cataract / Q000000981:diagnostic imaging* / Q000453:epidemiology / Q000209:etiology; D015862:Choroid Diseases / Q000000981:diagnostic imaging*; D005128:Eye Diseases / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009901:Optic Nerve Diseases / Q000000981:diagnostic imaging*; D011300:Preoperative Care / Q000379:methods; D011379:Prognosis; D012164:Retinal Diseases / Q000000981:diagnostic imaging*; D012189:Retrospective Studies; D017678:Sex Distribution; D014463:Ultrasonography; D014822:Vitreous Body / Q000000981:diagnostic imaging*