December 1994
Volume 35, Issue 13
Free
Articles  |   December 1994
Computational principles in Purkinje I and IV reflection pattern evaluation for the assessment of ocular alignment.
Author Affiliations
  • J C Barry
    Department of Ophthalmology, RWTH Aachen University Hospital, Germany.
  • R Effert
    Department of Ophthalmology, RWTH Aachen University Hospital, Germany.
  • M Reim
    Department of Ophthalmology, RWTH Aachen University Hospital, Germany.
  • D Meyer-Ebrecht
    Department of Ophthalmology, RWTH Aachen University Hospital, Germany.
Investigative Ophthalmology & Visual Science December 1994, Vol.35, 4205-4218. doi:
  • Views
  • PDF
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      J C Barry, R Effert, M Reim, D Meyer-Ebrecht; Computational principles in Purkinje I and IV reflection pattern evaluation for the assessment of ocular alignment.. Invest. Ophthalmol. Vis. Sci. 1994;35(13):4205-4218.

      Download citation file:


      © ARVO (1962-2015); The Authors (2016-present)

      ×
  • Supplements
Abstract

PURPOSE: To develop a standardized reasoning for the evaluation of Purkinje I and IV Reflection Pattern data in primary, secondary, and tertiary positions of gaze in the diagnosis of strabismus with a mathematical approach. To demonstrate the applicability of certain mathematical relations and the appropriate graphic representation of computed ocular alignment data. METHODS: Starting from the known Reflection Pattern Evaluation formulae, equations were derived that allowed for the computation of the relative and absolute positions of the optical and visual axes of both eyes from original data in binocular and monocular fixation. These equations were simplified for clinical use. RESULTS: The authors obtained a set of equations that could be applied to the objective, quantitative analysis of eye alignment in screening for microtropia, in concomitant and incomitant diagnoses of strabismus in primary and nonprimary positions. CONCLUSIONS: Purkinje I and IV Reflection Pattern Evaluation can be extended to the diagnosis of strabismus in nonprimary positions with sufficient clinical accuracy. The newly presented principles and equations serve as a basis for a convenient graphic representation of Purkinje I and IV Reflection Pattern data. These principles of evaluation may be applied to any data dealing with ocular alignment, independently of the method.

×
×

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.

×