Date of Graduation
2001
Document Type
Thesis
Degree Type
MS
Committee Chair
James E. Smith
Abstract
The eye is a very sensitive organ of the human body, and is subject to many hazards that may cause disorders such as miosis. Thus non-costly, non-invasive, safe methods for pupil assessment and monitoring are of the essence. Proposed is a simple eye scanning mechanism that periodically reports whether the pupil has experienced miosis or dilatation due to an external illumination source. The process uses a Clanguage program to control the image-grabbing process, as well as determining the pupil constriction/dilation conditions. The program focuses on dynamically isolating the pupil by producing a threshold for it that varies with the measured light level, producing a threshold-illumination (TI) curve. Various tests were conducted using a fixed setup to study the pupillary size with different pupils, over different periods, and while changing the pupil's position. Using a standard monochrome camera and lens, monitoring the pupil was made possible using safe levels of a self-designed infrared light-emitting diode flashlight. It was concluded that linear TI curves produced the most efficient results after accounting for a consistent precision correction-factor in the data. Proposed is an algorithm and apparatus for further investigation and implementation of this pupillary monitoring mechanism.
Recommended Citation
El-Sherbeeny, Ahmed M., "A non-invasive technique for monitoring miotic eye responses." (2001). Graduate Theses, Dissertations, and Problem Reports (ETD). 10837.
https://researchrepository.wvu.edu/etd/10837