Optimization of the monocular indirect ophthalmoscope
LE3 .A278 2012
Bachelor of Science
The ophthalmoscope is an important instrument for all optometrists and ophthal- mologists for characterizing the state of health of the eye. In the early 1990s the monocular indirect ophthalmoscope went out of production, and without the on- going support of the manufacturer, the optics of the device can deteriorate over time. A local optometrist initiated this research project, with the goal being to de- termine the optical elements causing the aberration, and how they may be xed. In order to understand the complex optics of the instrument and to investigate changes in the component on the end-use performance, an interactive computer program was developed, in the Processing™ environment, to model the device and an emmetropic eye using a ray optics formalism. The schematic model of the eye used was the Le Grand Full schematic eye. It was determined that the dimensions of the lament of the adapted bulb were not appropriate for the device. Information within the retinal image is lost due to the light from the extremity of the adapted bulb being cut o by the iris upon leaving the retina. To correct this issue, a new adapted bulb should be found with an overall lament length of less than 1.9 mm. This research will hopefully aid optometrists in maximizing the performance of their monocular indirect ophthalmoscopes for many years to come.
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