Several observations on the therapeutic effect of arlyl nitrite in retinal pigment degeneration

1935 ◽  
Vol 31 (10) ◽  
pp. 1188-1194
Author(s):  
V. I. Grigoriev ◽  
L. A. Dymschitz
Keyword(s):  
Optic Nerve ◽  
Blood Vessels ◽  
Therapeutic Effect ◽  
Blood Supply ◽  
Retinal Pigment ◽  
Retinal Blood Vessels

Pigmented regeneration of the retina is one of those diseases of the eye's light-receiving apparatus, where the fact of poor blood supply to the retina and the optic nerve is striking. This is manifested by the more or less sharp contraction of retinal blood vessels visible in the ophthalmoscope.

3-D segmentation of retinal blood vessels in spectral-domain OCT volumes of the optic nerve head

2010 ◽  
Author(s):  
Kyungmoo Lee ◽  
Michael D. Abràmoff ◽  
Meindert Niemeijer ◽  
Mona K. Garvin ◽  
Milan Sonka
Keyword(s):  
Optic Nerve ◽  
Blood Vessels ◽  
Optic Nerve Head ◽  
Spectral Domain ◽  
Spectral Domain Oct ◽  
Retinal Blood Vessels

scholarly journals Note on the blood-vessel-system of the retina of the hedgehog (being a fourth contribution to the anatomy of the retina)

1869 ◽  
Vol 17 ◽  
pp. 357-358
Keyword(s):  
Optic Nerve ◽  
Blood Vessel ◽  
Blood Vessels ◽  
Lamina Cribrosa ◽  
Variable Number ◽  
Deep Pit ◽  
Retinal Blood Vessels ◽  
Membrana Limitans Interna ◽  
Inner Surface ◽  
Arteries And Veins

The distribution of the retinal blood-vessels in this common British Insectivore is so remarkable that I deem it worthy of a separate notice— only capillaries enter the retina . The vasa centralia pierce the optic nerve in the sclerotic canal, and, passing forwards through the lamina cribrosa, divide, at the bottom of a relatively large and deep pit in the centre of the intraocular disk of the nerve, into a variable number of primary branches, from three to six. These primary divisions quickly subdivide, furnishing many large arteries and veins, which, radiating on all sides from the nerve-entrance towards the ora retinæ, appear to the observer’s unaided eye as strongly projecting ridges upon the inner surface of the retina. When vertical sections parallel to and across the direction of these ridges are examined with a quarter-inch objective, we immediately perceive that the arteries and veins lie, throughout their entire course, upon the inner surface of the membrana limitans interna retinæ, between this and the membrana hyaloidea of the vitreous humour, and that only capillaries penetrate the retina itself.

scholarly journals Bilateral peripapillary staphyloma: a case report

2019 ◽  
Author(s):  
Hong-cheng Gao ◽  
Meng Wang ◽  
Yaoyao Shi ◽  
Chen Chen
Keyword(s):  
Case Report ◽  
Optic Nerve ◽  
Visual Loss ◽  
Pigment Epithelium ◽  
Retinal Pigment ◽  
Case Presentation ◽  
Poor Vision ◽  
Retinal Blood Vessels ◽  
Bilateral Case ◽  
Peripapillary Staphyloma

Abstract Background: The peripapillary staphyloma (PS) is a rare non-hereditary congenital optic disc dysplasia, which is generally unilateral and is likely to occur with poor vision. Fundus uncovered a large deeply excavated optic nerve head, retinal pigment epithelium changes at its edges and normal disc and retinal blood vessels in size and features. Case presentation: This literature present a bilateral case of an especially congential peripaillary staphyloma (CPS), which the patient with esotropia and nystagmus was exposed to abnormality when she was only 5-month-old. Several interesting features are present in this patient. Conclusions: Usually they have a large extent on visual loss. Thus, although extreme rare, an early detection, treatment and follow ups are necessary. Keywords: Staphyloma; optic nerve; congenital

scholarly journals Retinal Vessel Analysis for Detection of Glaucoma

2021 ◽  
Vol 9 (VII) ◽  
pp. 3661-3667
Author(s):  
Chandana R
Keyword(s):  
Intraocular Pressure ◽  
Optic Nerve ◽  
Blood Vessels ◽  
Vision Loss ◽  
Retinal Vessel ◽  
Automated Analysis ◽  
Vessel Segmentation ◽  
Morphological Attributes ◽  
Retinal Blood Vessels ◽  
Retinal Vessel Segmentation

Glaucoma, a disease of the optic nerve is caused by the increase in the intraocular pressure of the eye and results in damage to the optic nerve and vision loss. The main characteristic of glaucoma is an elevated intraocular pressure (IOP) and also the blood vessels get narrower. Vessel segmentation is one of the main steps in retinal automated analysis tools. Retinal vessel segmentation and delineation of morphological attributes of retinal blood vessels are utilized for diagnosis, screening, treatment, and evaluation of various cardiovascular and ophthalmologic diseases. Since, the numbers of blood vessels are more in the glaucomatous eye , glaucoma is detected by means of ISNT ratio. The image processing operations are performed on glaucomatous and normal eyes. We have chosen ten images of each from the database and ISNT ratio is calculated to get the area of blood vessels in each of the four quadrants of the eye and hence glaucoma is detected.

Innervation of endoneurial microvessels in human sural nerve

1992 ◽  
Vol 50 (1) ◽  
pp. 920-921
Author(s):  
John L. Beggs ◽  
Peter C. Johnson ◽  
Astrid G. Olafsen ◽  
C. Jane Watkins
Keyword(s):  
Blood Flow ◽  
Blood Vessels ◽  
Blood Supply ◽  
Peripheral Nerves ◽  
Sural Nerve ◽  
Nerve Fibers ◽  
Arterial Supply ◽  
Autonomic Nerve ◽  
Vasa Nervorum ◽  
Endoneurial Blood Flow

The blood supply (vasa nervorum) to peripheral nerves is composed of an interconnected dual circulation. The endoneurium of nerve fascicles is maintained by the intrinsic circulation which is composed of microvessels primarily of capillary caliber. Transperineurial arterioles link the intrinsic circulation with the extrinsic arterial supply located in the epineurium. Blood flow in the vasa nervorum is neurogenically influenced (1,2). Although a recent hypothesis proposes that endoneurial blood flow is controlled by the action of autonomic nerve fibers associated with epineurial arterioles (2), our recent studies (3) show that in addition to epineurial arterioles other segments of the vasa nervorum are also innervated. In this study, we examine blood vessels of the endoneurium for possible innervation.

scholarly journals Retinal blood vessels segmentation using classical edge detection filters and the neural network

2021 ◽  
Vol 23 ◽  
pp. 100521
Author(s):  
Beaudelaire Saha Tchinda ◽  
Daniel Tchiotsop ◽  
Michel Noubom ◽  
Valerie Louis-Dorr ◽  
Didier Wolf
Keyword(s):  
Neural Network ◽  
Edge Detection ◽  
Blood Vessels ◽  
The Neural Network ◽  
Retinal Blood Vessels

scholarly journals Investigation of Bilateral Similarity in Central Retinal Blood Vessels

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Sangeeta Biswas ◽  
Johan Rohdin ◽  
Andrii Kavetskyi ◽  
Gabriel Saraiva ◽  
Angkan Biswas ◽  
...  
Keyword(s):  
Blood Vessels ◽  
Retinal Blood Vessels

Blood Supply of the Optic Nerve Head

1996 ◽  
Vol 210 (5) ◽  
pp. 285-295 ◽  
Author(s):  
Sohan Singh Hayreh
Keyword(s):  
Optic Nerve ◽  
Blood Supply ◽  
Optic Nerve Head
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