منابع مشابه
Focusing The Fundus Camera: A Clinical Approach
Ophthalmic photography is a system of information transferral. In fundus photography, a visual description of the three-dimensional retinal and choroidal tissues is transferred to film. This twodimensional representation is used by the physician to make judgments concerning the health and treatment of the patient's retina. An accurate representation of the retinal and choroidal tissues is the g...
متن کاملA new fundus camera technique to help calculate eye-camera magnification: a rapid means to measure disc size.
OBJECTIVE To find a simple means for calculating eye-camera magnification to permit estimation of true retinal object size from a retinal photograph. METHODS The position of the focusing knob on 3 different retinal cameras (TRC-50F and TRC-50X; Topcon America Corp, Paramus, NJ; and the CR6-45NM Non-mydriatic Retinal Camera; Canon Inc, Tokyo, Japan) was measured during optic nerve photography ...
متن کاملA simple nonmydriatic self-retinal imaging procedure using a Kowa Genesis-D hand-held digital fundus camera.
Research on vascular adaptation to microgravity in the central nervous system requires a simple, noninvasive, direct imaging technique that can be performed with compact equipment. In this report we describe a practical, nonmydriatic, retinal self-imaging technique using a Kowa Genesis-D hand-held digital camera and a Black and Decker laser level. This simple technique will be useful to clinica...
متن کاملAbsolute blood velocity measured with a modified fundus camera.
We present a new method for the quantitative estimation of blood flow velocity, based on the use of the Radon transform. The specific application is for measurement of blood flow velocity in the retina. Our modified fundus camera uses illumination from a green LED and captures imagery with a high-speed CCD camera. The basic theory is presented, and typical results are shown for an in vitro flow...
متن کاملSimultaneous stereoscopic fundus camera incorporating a single optical axis.
The method of stereoscopic fundus photography, where both photographs are taken simultaneously, yields the most consistent and reproducible record of depths in the fundus. However, all systems devised to date have had undesirable photographic aberrations. For the most part, this has resulted because the optical axis of each image is not the same as that of the objective lens. A single-axis syst...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Juntendo Medical Journal
سال: 1960
ISSN: 0022-6769,2188-2134
DOI: 10.14789/pjmj.6.157