Research on retinal circulation during space flight required the development of a simple technique to provide self monitoring of blood vessel changes in the fundus without the use of mydriatics. A Kowa RC-2 fundus camera was modified for self-photography by the use of a bite plate for positioning and cross hairs for focusing the subject's retina relative to the film plane. Dilation of the pupils without the use of mydriatics was accomplished by dark adaption of the subject. Pictures were obtained without pupil constriction by the use of a high speed strobe light. This method also has applications for clinical medicine.
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Response "Conversion of the Kowa RC-2 camera to a digital version, instructions for use and postprocessing of the images" by Drs. Dulaurent, Bath & Isard.
Vet Ophthalmol
July 2015
ECVO HED (Hereditary Eye Diseases) Committee Chair, Animal Eye Practise, Berlin, Germany.
Conversion of the Kowa RC-2 camera to a digital version, instructions for use, and postprocessing of the images.
Vet Ophthalmol
November 2014
Centre Hospitalier Vétérinaire, 275 Route Impériale, 74370, Saint-Martin Bellevue, France.
Objective: To describe a means of converting the Kowa RC-2 camera to a digital version.
Procedure: The optic (OP) and the film portions (FP) of the Kowa RC-2 were separated. The lateral rails were unscrewed from the front plate of the FP.
Optic disc photogrammetry: magnification factors for eye position, centration, and ametropias, refractive and axial; and their application in the diagnosis of optic nerve hypoplasia.
Ann Ophthalmol
December 1989
Department of Ophthalmology, University of Florida College of Medicine, Gainesville.
To determine if image magnification from ametropia or other factors required correction in the photogrammetric diagnosis of optic nerve hypoplasia, the following variables were studied using two standard 30 degrees field fundus cameras (Zeiss FF-3 and Kowa RC-2): (1) distance between the camera and the subject--variations in this distance do not change the image size; (2) decentration of the camera (i.e., decentration of the optic disc image within the field)--no effect was found using the Kowa camera, but in the Zeiss, a 2% (0.
View Article and Find Full Text PDFThe method for observing the eye-fundus of rhesus monkeys was devised by the use of Kowa RC-2 Hand-held Fundus Camera. 1. For monochrome photography, Fuji Neopan F (ASA 32) and Fuji Neopan SS (ASA 100) films were used.
View Article and Find Full Text PDFResearch on retinal circulation during space flight required the development of a simple technique to provide self monitoring of blood vessel changes in the fundus without the use of mydriatics. A Kowa RC-2 fundus camera was modified for self-photography by the use of a bite plate for positioning and cross hairs for focusing the subject's retina relative to the film plane. Dilation of the pupils without the use of mydriatics was accomplished by dark adaption of the subject.
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