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- Titel:
[Comparison of diameter response of retinal arteries and veins to flickering light. A clinical study with healthy people]
- Dokumenttyp:
- Clinical Trial; Journal Article
- Autor(en):
- Nagel, E; Vilser, W; Lanzl, I
- Abstract:
- PURPOSE: The aim of this study was to compare the diameter response of retinal arteries and veins after provocation with flickering light regarding the amplitude and temporal course. METHODS: The study included 26 healthy volunteers. The vessel diameter was automatically and continuously measured by the retinal vessel analyzer. The examination consisted of a baseline measurement (100 s) followed by five periods of 20-s flicker light provocation and 80-s follow-up observation. RESULTS: A diameter dilation was observed immediately after the end of the flicker period in arteries (6.9+/-2.8%) and veins (6.5+/-2.8%, difference n.s.). The quotient of arterial and venous dilation (AVDQ) was 1.25+/-0.69 (range: 0.2-2.8). A significant correlation of age and arterial or venous dilation or the AVDQ was not observed. The arterial diameter reduced faster than the venous and reached a minimum of -2.7+/-1.4% at 25.9+/-10.8 s after the end of the flicker phase. The veins were dilated by 0.5+/-1.3% at the time of the maximal individual arterial constriction (p<0.0001). CONCLUSIONS: Flicker-evoked response of retinal arteries and veins did not differ in the dilative amplitude but in the temporal course of the abatement of the dilation.
- Zeitschriftentitel:
- Ophthalmologe
- Jahr:
- 2005
- Band / Volume:
- 102
- Heft / Issue:
- 8
- Seitenangaben Beitrag:
- 787-93
- Sprache:
- de
- Volltext / DOI:
- doi:10.1007/s00347-005-1191-9
- PubMed:
- http://view.ncbi.nlm.nih.gov/pubmed/15759121
- Print-ISSN:
- 0941-293X
- TUM Einrichtung:
- Klinik und Poliklinik für Augenheilkunde
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