Fiber optics for perimetry based on video oculography
Ernesto Suaste-Gómez, Laura Solis Landaverde, Palmira Rivera Arzola · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1994
We have been working with the association of two techniques -- the static perimetry and the video-oculography -- to obtain automatic and objective determinations of dynamic pupillary reflexes in both eyes to measure the visual fields. For the static perimetry we designed and developed an instrument based on a fiber optic-projection target using a plastic fiber optic like light guide. By means of a rotary mechanical-optical device (step motor), controlled by a PC interface, we select the proximal end of one of 200 plastic fiber optics; we adhere all distal extremes on a translucent-material hemisphere; we assure the projection of localized and constant area light stimulus. We controlled the light intensity and stimulus duration. We employed a calibrated light source capable of providing 358 lux light intensity. In color perimetry results we provided the use of color filters controlled by small electro-mechanical gates. For the video-oculography the eye image is captured by a closed circuit TV camera on line. At the same time the image of the pupil is recorded in a VCR to analyze the pupillary reflexes with a computer system and image processing.