Retinal vascular patterns in domestic animals.
Abstract: In this paper a morphological study of the retinal vascular patterns in various species of domestic animals is reported. A classification of these patterns into four well-defined groups is described. In the domestic ruminants, pigs and carnivores the retina contains a compact plexus of blood vessels located in the major part of the light-sensitive portion of the retina (euangiotic or holangiotic pattern). In other domestic animals blood vessels are present only in a smaller part of the retina. In the rabbit, vessels are confined to a broad horizontal band coincident with the area of dispersion of the myelinated nerve fibres. The larger of these vessels are readily visible macroscopically (merangiotic pattern). In the horse and the guinea pig the retinal blood vessels are minute and restricted to the direct neighbourhood of the optic disc (paurangiotic pattern). The avian retina is completely avascular (anangiotic pattern), but a densely vascularised pecten oculi is attached to the linear optic nerve head and protrudes far into the inferior part of the vitreous body.
Publication Date: 1989-07-01 PubMed ID: 2772405
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- Journal Article
Summary
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The research paper provides an insight into the diverse patterns of retinal blood vessels found in different species of domestic animals. It classifies these patterns into four distinct groups based on their distinctive distribution and structure within the retina.
Objective of Research
- The primary objective of this study was to assess and describe the different morphologies of retinal vascular patterns in various species of domestic animals.
Classification of Retinal Vascular Patterns
- The research identified and categorized the vascular patterns into four distinct groups: euangiotic or holangiotic, merangiotic, paurangiotic, and anangiotic.
Euangiotic or Holangiotic Pattern
- This pattern was found in domestic ruminants, pigs, and carnivores.
- It is characterized by a dense network of blood vessels covering the majority of the light-sensitive part of the retina.
Merangiotic Pattern
- This retinal vascular pattern was observed in rabbits.
- In this pattern, blood vessels are restricted to a wide horizontal band coinciding with the area of dispersion of the myelinated nerve fibers.
- The larger blood vessels in this category can be easily seen with the naked eye.
Paurangiotic Pattern
- The paurangiotic pattern was identified in horses and guinea pigs.
- This pattern features minute retinal blood vessels that are confined to the immediate vicinity of the optic disc.
Anangiotic Pattern
- The anangiotic pattern was identified in the avian retina.
- This pattern represents the complete absence of blood vessels in the retina.
- Despite this, a densely vascularized structure known as the pecten oculi is attached to the optic nerve head, projecting significantly into the lower part of the gel-filled section of the eye, known as the vitreous body.
Conclusion
- This research has led to a better understanding of the diverse structures of retinal vasculature in domestic animals.
- The findings will likely be useful in comparative veterinary ophthalmology, and can also warrant further investigation into evolutionary and functional aspects.
Cite This Article
APA
De Schaepdrijver L, Simoens P, Lauwers H, De Geest JP.
(1989).
Retinal vascular patterns in domestic animals.
Res Vet Sci, 47(1), 34-42.
Publication
Researcher Affiliations
- Laboratory of Anatomy, Histology and Embryology of Domestic Animals, Faculty of Veterinary Medicine, State University of Ghen, Belgium.
MeSH Terms
- Animals
- Animals, Domestic / anatomy & histology
- Cats / anatomy & histology
- Cattle / anatomy & histology
- Columbidae / anatomy & histology
- Dogs / anatomy & histology
- Goats / anatomy & histology
- Guinea Pigs / anatomy & histology
- Horses / anatomy & histology
- Microscopy, Electron, Scanning
- Rabbits / anatomy & histology
- Retinal Vessels / anatomy & histology
- Retinal Vessels / ultrastructure
- Sheep / anatomy & histology
- Swine / anatomy & histology
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