AIM: The study investigated the variance of the retinal vessel response to
flicker light between the right and left eyes and after a short and a
medium-length time interval. METHODS: The prospective study included 28
volunteers. In the first exam both eyes were examined. One eye selected randomly
was measured again after 1 h and after 1 month. The diameter response of an
arterial and venous vessel segment was measured continuously by a Dynamic Vessel
Analyzer (DVA, IMEDOS, Jena). Each examination consisted of 50 s baseline
measurement and three periods of 20-s flicker light provocation followed by 80 s
observation. The mean of three provocational cycles was calculated as dynamic
vessel response. RESULTS: A significant correlation of the flicker response
parameters between the right and left eyes was found. Arterial and venous
baseline diameter, flicker light dilation, AVDQ, and BP did not change
significantly between the first and follow-up examinations. There was no
correlation between changes of BP and changes of vessel diameter parameters in
the follow-up exams. CONCLUSION: Flicker-evoked dilation of retinal arterioles
measured by the DVA is characterized under similar conditions by small variance
after short and medium-length time periods. Therefore, this parameter is suitable
as a functional parameter of the regulation ability of retinal arteries.
%0 Journal Article
%1 Nagel.2006
%A Nagel, E.
%A Vilser, W.
%A Fink, A.
%A Riemer, T.
%D 2006
%J Der Ophthalmologe : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
%K Aged;Photic Anatomy, Artery/*anatomy Computer-Assisted/*methods;*Light;Male;Middle Cross-Sectional/*methods;Female;Humans;Image Interpretation, Results;Retinal Specificity;Vasodilation/*radiation Stimulation/*methods;Reproducibility WViCo and effects effects;Sensitivity histology/*radiation of {\&}
%N 2
%P 114--119
%R 10.1007/s00347-005-1254-y
%T Varianz der Netzhautgefäßreaktion auf Flickerlicht: Variance of retinal vessel diameter response to flicker light. A methodical clinical study
%V 103
%X AIM: The study investigated the variance of the retinal vessel response to
flicker light between the right and left eyes and after a short and a
medium-length time interval. METHODS: The prospective study included 28
volunteers. In the first exam both eyes were examined. One eye selected randomly
was measured again after 1 h and after 1 month. The diameter response of an
arterial and venous vessel segment was measured continuously by a Dynamic Vessel
Analyzer (DVA, IMEDOS, Jena). Each examination consisted of 50 s baseline
measurement and three periods of 20-s flicker light provocation followed by 80 s
observation. The mean of three provocational cycles was calculated as dynamic
vessel response. RESULTS: A significant correlation of the flicker response
parameters between the right and left eyes was found. Arterial and venous
baseline diameter, flicker light dilation, AVDQ, and BP did not change
significantly between the first and follow-up examinations. There was no
correlation between changes of BP and changes of vessel diameter parameters in
the follow-up exams. CONCLUSION: Flicker-evoked dilation of retinal arterioles
measured by the DVA is characterized under similar conditions by small variance
after short and medium-length time periods. Therefore, this parameter is suitable
as a functional parameter of the regulation ability of retinal arteries.
@article{Nagel.2006,
abstract = {AIM: The study investigated the variance of the retinal vessel response to
flicker light between the right and left eyes and after a short and a
medium-length time interval. METHODS: The prospective study included 28
volunteers. In the first exam both eyes were examined. One eye selected randomly
was measured again after 1 h and after 1 month. The diameter response of an
arterial and venous vessel segment was measured continuously by a Dynamic Vessel
Analyzer (DVA, IMEDOS, Jena). Each examination consisted of 50 s baseline
measurement and three periods of 20-s flicker light provocation followed by 80 s
observation. The mean of three provocational cycles was calculated as dynamic
vessel response. RESULTS: A significant correlation of the flicker response
parameters between the right and left eyes was found. Arterial and venous
baseline diameter, flicker light dilation, AVDQ, and BP did not change
significantly between the first and follow-up examinations. There was no
correlation between changes of BP and changes of vessel diameter parameters in
the follow-up exams. CONCLUSION: Flicker-evoked dilation of retinal arterioles
measured by the DVA is characterized under similar conditions by small variance
after short and medium-length time periods. Therefore, this parameter is suitable
as a functional parameter of the regulation ability of retinal arteries.},
added-at = {2013-10-10T21:29:09.000+0200},
author = {Nagel, E. and Vilser, W. and Fink, A. and Riemer, T.},
biburl = {https://www.bibsonomy.org/bibtex/24fac2df3b681d21957071ec54ca4e62d/imedos},
doi = {10.1007/s00347-005-1254-y},
interhash = {9578712e21ed0b48e426903c49d4ab2c},
intrahash = {4fac2df3b681d21957071ec54ca4e62d},
issn = {0941-293X},
journal = {Der Ophthalmologe : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft},
keywords = {Aged;Photic Anatomy, Artery/*anatomy Computer-Assisted/*methods;*Light;Male;Middle Cross-Sectional/*methods;Female;Humans;Image Interpretation, Results;Retinal Specificity;Vasodilation/*radiation Stimulation/*methods;Reproducibility WViCo and effects effects;Sensitivity histology/*radiation of {\&}},
number = 2,
pages = {114--119},
timestamp = {2013-10-11T01:11:02.000+0200},
title = {Varianz der Netzhautgef{\"a}{\ss}reaktion auf Flickerlicht: [Variance of retinal vessel diameter response to flicker light. A methodical clinical study]},
volume = 103,
year = 2006
}