Holographic Detection of Intraocular Pathology in the Presence of Cataracts.
Abstract
The inability to observe intraocular pathology behind cataracts is a particularly acute problem to the ophthalmologist from the standpoints of assessment and continuing diagnosis. Moreover, when immediate surgery is required, precise location of the damage and assessment of the pathological necessities are seriously hampered. This report presents theoretical support and conclusive experimental evidence that insofar as light propagation is concerned, the cataract may be considered to be a stationary, random phase-distorting medium rather than a random absorbing medium, and thus the technique of phase aberration balancing was used most effectively to cancel the cataract's aberrating power. The procedure consists of forming an interferometric record (hologram) of the phase aberrations. This record may then be used as a filter, in conjunction with the cataract itself, to correct what would otherwise be highly distorted imagery. The holographic techniques may also be used to assess many of the pertinent physical parameters of cataracts such as the index of refraction fluctuations, their distribution and the size and distribution of scattering centers. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1972
- Accession Number
- AD0751200
Entities
People
- David A. B. Miller
- George O. Reynolds
- Joel L. Zuckerman