Title: Computer Assisted Acoustic Measurements of the Posterior Ocular Coats
Abstract: The thickness of the posterior ocular coats of the eye (the retina, choroid, and sclera) has only been evaluable by indirect methods such as histologic examination, which allow extrapolation to the in vivo thickness. Many functional and aging processes are related to the integrity and thickness of these structures, thus the ability to provide an in vivo measurement would be valuable in studying both normal variations and disease states. We have devised a system for such measurements, using computer-assisted ultrasonic evaluation. Samples obtained with a high-resolution, combined B-and A-scan instrument can be analysed and thin boundary layers can be delineated to an accuracy of 10 microns, by analysis of the resonant reflectance from the front and rear surfaces of the retina, choroid, and sclera. We have studied a series of patients to determine the normal values for thickness of the posterior ocular coats in various locations within the eye. Specifically, comparison of these structures in the macular area to more peripheral areas are presented. The range of normal thickness to those observed in pathologic studies such as macular degeneration, trauma, inflammatory conditions, and myopia will be discussed.
Publication Year: 1981
Publication Date: 1981-01-01
Language: en
Type: book-chapter
Indexed In: ['crossref']
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot