Introduction: This paper addresses a method for automatic detection of blood vessels in color fundus images which utilizes two main tools: image partitioning and local Radon transform. Material and Methods: The input images are firstly divided into overlapping windows and then the Radon transform is applied to each. The maximum of the Radon transform in each window corresponds to the probable a...

Three methods of determining the actual size of objects on the living fundus were utilized to measure the horizontal disc diameter (H) in 68 volunteers. H1 was calculated from fundus photographs based on the refractive power of the eye and according to the formula of Bengtsson and Krakau. H2 was derived from Littmann's trigonometric curves based on the anterior corneal curvature and the refract...

Fundus biomicroscopy with the slit lamp as it is practiced widely nowadays was not established until the 1980-es with the introduction of the Volk lenses +90 and +60D. Thereafter little progress has been made in retinal imaging with the slit lamp. It is the aim of this paper to fully exploit the potential of a video slit lamp for fundus documentation by using easily accessible additions. Suitab...

Smartphone fundus photography is a simple technique to obtain ocular fundus pictures using a smartphone camera and a conventional handheld indirect ophthalmoscopy lens. This technique is indispensable when picture documentation of optic nerve, retina, and retinal vessels is necessary but a fundus camera is not available. The main advantage of this technique is the widespread availability of sma...

BACKGROUND To guide treatment for macular diseases and to facilitate real-time image correlation, measurement, and comparison, we developed a method for direct overlay of previously stored photographic and angiographic images onto the real-time slitlamp fundus view. METHODS Previously acquired fundus photographs and angiography images were digitized. A slitlamp interfaced to a charge-coupled ...

BACKGROUND Syphilitic chorioretinitis can produce severe vision loss. However, the clinical manifestations of syphilitic chorioretinitis are still unclear, particularly during different stages. Herein, we will present our diagnostic technique for syphilitic chorioretinitis. METHODS This retrospective study recruited 109 cases; we performed a clinical evaluation including case history, serolog...

We elucidated the distribution of interstitial cells of Cajal (ICC) in human stomach, using cryosection and c-Kit immunohistochemistry to identify c-Kit positive ICC. Before c-Kit staining, we routinely used hematoxylin and eosin (HE) staining to identify every structure of human stomach, from mucosa to longitudinal muscle. HE staining revealed that the fundus greater curvature (GC) had promine...

Sorsby (I939) used intravenous Kiton green to produce permanent vital staining of the diseased human retina. Other workers have used vital staining dyes in experimental animals. Steinhausen and Loreth (I965) used Lissamin green in investigating the rat retina. Riehm and Podesta (I97 I) used both Patent blue (Disulphine blue) and Lissamin green in an examination of choroidal blood flow in an exp...