[A method for recording the network topology of human retinal vessels].

Abstract:

:Network analysis of the human retinal vessels must be based on a thorough knowledge of the topology of the network. This derives from the numerical composition of the network's individual components. Using histologic specimens, centrifugal and centripetal ordering methods were compared. It was found necessary to use an ordering system which takes both dichotomous as well as lateral branching into account, and Strahler's centripetal ordering system was found to be suitable. For various representative areas of human retinae it could be shown that the number of segments of each Strahler order forms an inverse geometric sequence which enables the Horton branching quotient RB to be calculated. It is thus possible to predict the number of vessel segments within the individual orders. Although the method ignores detailed vessel morphology, with knowledge of the vessel lengths and diameters determined in the same manner it enables the conductivity and resistance of human retinal vessels to be measured.

journal_name

Klin Monbl Augenheilkd

authors

Schröder S,Schmid-Schönbein GW,Schmid-Schönbein H,Brub M,Reim M

doi

10.1055/s-2008-1046240

subject

Has Abstract

pub_date

1990-07-01 00:00:00

pages

33-9

issue

1

eissn

0023-2165

issn

1439-3999

journal_volume

197

pub_type

杂志文章
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    authors: Schulze DP,Freese R,Sauerwald R

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    authors: Pietruschka G,Priess G

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    doi:

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  • [Lymphatic congestion of the conjunctiva after pre-auricular lymph node excision].

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  • [Rehabilitation of lesions in the visual pathways].

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  • [The Motor Development of Children with Infantile Esotropia].

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  • [Statistical methods for comparison of two measuring procedures and for calibration: analysis of concordance, correlation and regression in the case of measuring intraocular pressure].

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  • [Patient Mobility and Journey Distance as Risk Factors for Severe Visual Impairment: Real-Life Data Analysis of Treatment-naïve Patients with nAMD under Intravitreal Aflibercept Therapy].

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  • [Sensitivity of the computer perimeter Competer in early glaucomatous loss of visual field. A controlled study].

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  • [Comparative investigation of the etiology of visual field defects after epimacular surgery].

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  • [Effect of dark adaptation on retinal blood flow].

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    authors: Riva CE,Logean E,Petrig BL,Falsini B

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  • [Ultrastructural changes in keratoconus].

    abstract::In case of keratoconus the epithelial cells are also participating in the pathological processes. Their activity of producing basal membrane is increased. In the stroma four cell types are found; two of them are normal elements. The origin of the two pathological forms is unknown. They may represent as well vagrant ce...

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  • [Exudative retinal detachment, pigment epithelium tear and subretinal exudate in a case of central serous retinopathy].

    abstract::A thirty year old patient with central serous chorioretinopathy on his right eye is presented. The signs of his disease were exsudative retinal detachment with shifting fluid, rip of the retinal pigmentepithelium and a mass of whitish-yellowish subretinal protein. After the diagnosis was made light-coagulation was per...

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  • [Heterochromia complicata Fuchs, crystalline iridopathy and increased immunoglobulin G in aqueous humor. A case report].

    abstract::We report on a 35 year old patient suffering from heterochromia complicata Fuchs with a mature cataract. Multiple small whitish-yellowish crystal-lines on the iris at the 7 and 12 o'clock position were interpreted as Russell bodies and correlated with an elevated concentration of 7.2 mg/dl IgG in the aqueous humor ana...

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    更新日期:1991-03-01 00:00:00

  • [Diminution of myopia following operation of macular hole-induced retinal detachment].

    abstract::This paper presents an assessment of the diminution of myopia in 25 eyes after surgery according to the technique of G. P. Theodossiadis for retinal detachment due to a macular hole. The procedure consists in the stretching and fixation of a silicone sponge at the posterior pole and dispenses entirely with either cryo...

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    authors: Theodossiadis GP,Damanakis AG,Koutsandrea CN

    更新日期:1986-10-01 00:00:00

  • [Drug side-effects of the eye--a contribution to quality assurance in ophthalmology].

    abstract:BACKGROUND:The aim of this research is to catalogue the increasing number of side effects of medications on the eyes and, by putting this catalogue into a data bank, to make it available for use in hospitals. Here a deliberate search is made for medications, which could possibly cause certain side effects as well as a ...

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  • [Medical Management of Glaucoma].

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    更新日期:1984-10-01 00:00:00

  • [Stem Cells for Retina Replacement].

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  • [Gene therapy in corneal diseases].

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  • [Loss of function and morphological changes in subfoveolar choroidal neovascularisations and various beginnings of photodynamic therapies].

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  • [Echographic diagnosis of efferent lacrimal ducts with contrast media].

    abstract:BACKGROUND:Affections of the lacrimal drainage system are often seen by ophthalmologists. Inspection, palpation, diagnostic rinsing and sounding can distinguish anatomical stops before or after tear sac. For final diagnostics however more apparative examinations are necessary. The ultrasonic examination with contrast m...

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    pub_type: 杂志文章

    doi:

    authors: Zirm K,Hofmann H,Zirm M

    更新日期:1978-02-01 00:00:00