Visual Acuity Prediction Before Neodymium-YAG: Laser Posterior Capsulotomy

Thomas B. Klein, Allan R. Slomovic, Richard K. Parrish, Robert W. Knighton

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


A laser interferometer (Retinometer) and the Potential Acuity Meter (PAM) was used to assess macular function before neodymium-YAG laser posterior capsulotomy in 40 patients. Although specificity was excellent with the PAM (91%) and Retinometer (93%), sensitivity was limited to 42% and 33%, respectively. Diffuse posterior capsular opacification which precluded the delivery of light through a clear portion of the capsule was the most likely cause of the high false negative rate. A positive result on either test has good predictive value, reducing the chances of the capsulotomy being a failure by fourfold.

Original languageEnglish (US)
Pages (from-to)808-810
Number of pages3
Issue number6
StatePublished - 1986


  • Potential Acuity Meter
  • laser interferometry
  • neodymium-YAG laser
  • posterior capsulotomy

ASJC Scopus subject areas

  • Ophthalmology


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