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Cilioretinal arteries in large optic disks.

J B Jonas1, I Guggenmoos-Holzmann, G O Naumann

  • 1Department of Ophthalmology, University of Erlangen-Nürnberg, FRG.

Ophthalmic Research
|January 1, 1988
PubMed
Summary

Cilioretinal arteries, a bypass in eye circulation, correlate with optic disk size in normal eyes. More vessels are found in larger optic disks, aiding in differentiating normal variations from glaucoma.

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Area of Science:

  • Ophthalmology
  • Optometry
  • Vascular Anatomy

Background:

  • Cilioretinal arteries provide a physiologic bypass between ciliary and retinal circulation.
  • Understanding their prevalence and correlation with optic nerve head morphology is crucial for clinical diagnosis.

Purpose of the Study:

  • To investigate the correlation between the number of cilioretinal arteries and optic disk and cup size in normal eyes.
  • To determine the prevalence of cilioretinal arteries in relation to optic disk area.
  • To assess the utility of cilioretinal arteries in differentiating physiologic macrocups from glaucomatous cupping.

Main Methods:

  • Evaluation of optic nerve head photographs from 163 normal subjects.
  • Quantitative analysis of optic disk and cup size.
  • Correlation analysis between vessel count and morphometric parameters.

Main Results:

  • A significant positive correlation (p < 0.001) was found between the number of cilioretinal arteries and optic disk/cup size.
  • Prevalence of cilioretinal arteries was 27.0% in all optic disks.
  • Prevalence increased from 0% in disks < 2.00 mm² to 50.0% in disks > 4.1 mm².
  • No correlation was observed with refraction, axial length, side, sex, or age.

Conclusions:

  • The number of cilioretinal arteries is significantly associated with optic disk and cup size in healthy individuals.
  • The presence of two or three cilioretinal arteries suggests a congenitally large optic disk and cup.
  • This finding aids in distinguishing physiologic macrocups from glaucomatous changes.

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