New technology for examining the anterior segment by ultrasonic biomicroscopy

Nicholas P. Bell, Robert M. Feldman, Yali Zou, Thomas C. Prager

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


Purpose: To compare the comfort levels and measurement accuracy of the open-shell technique and a bag/balloon technology (ClearScan, ESI) in anterior segment ultrasound biomicroscopy. Setting: Department of Ophthalmology and Visual Science, Robert Cizik Eye Clinic, University of Texas Medical School at Houston, Houston, Texas, USA. Methods: In this prospective investigation, 20 subjects stated their preference and rated comfort (0 best to 5 worst) for the open-shell technique versus the bag/balloon technology. Three anterior chamber depth and sulcus-to-sulcus measurements were obtained, and the mean for each structure was taken as datum for each subject. Order presentation between the 2 methods was randomized. Pairwise t tests and linear regression analysis were used to determine statistical differences. Results: One hundred percent of the cohort preferred the bag/balloon technology to the traditional open-shell technique. The mean comfort score was 0.40 ± 0.53 (SD) and 2.95 ± 0.90, respectively (P<.0001). Anterior chamber depth measurements did not differ clinically (0.056 mm) nor did sulcus-to-sulcus determinations (0.039 mm). Conclusion: Biometry, patient comfort, and ease of use were better with the ClearScan bag/balloon technology than with the traditional open-shell technique.

Original languageEnglish (US)
Pages (from-to)121-125
Number of pages5
JournalJournal of Cataract and Refractive Surgery
Issue number1
StatePublished - Jan 2008

ASJC Scopus subject areas

  • Surgery
  • Ophthalmology
  • Sensory Systems


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