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Biomedical subjects

G Bartl

Publications and source records attributed to G Bartl.

49 records · Page 3Linked to original sources
PubMed1978

[Electroophthalmological investigations in amblyopia (author's transl)].

In the case of 8 amblyopic patients the ERG and the brightness VECP, as well as the TV-pattern reversal VECPs in whole field and upper and lower half field stimulation, were traced. In the ERG (a- and b-wave) and the brightness VECP significant differences were established neither in the amplitude nor in the latenz between amblyopic and healthy eyes. The amplitude of the pattern reversal VECPs in whole field and lower half field stimulation was significantly reduced in all 8 patients on the side of the amblyopic eye.

Amblyopia↗
PubMed1977

[Electrophysiological and fluorescence-angiographical examinations in a case of fundus albipunctatus cum hemeralopia congenita (author's transl)].

Electrophysiological and fluorescenceangiographical examinations were carried out in a case of fundus albipunctatus cum hemeralopia congenita. In the ERG a diminished scotopic b-wave was conspicuous, which reached the normal size after longer dark adaptation. It was possible to distinguish between albipunctatus-dots and druses by fluorescenceangiography. While the latter became clearly visible in the phase of choroidic-fluorescence the ophthalmoscopically perceptible albipunctatus-dots lost their visibility.

Adolescent↗
PubMed1976

[The alteration of visual evoked potentials in light- and dark-adapted states as a measure for the visual field sensibility at elevated intraocular pressure (author's transl)].

On 12 voluntary subjects with normal visual function the intraocular pressure was increased dependent on the ophthalmic blood pressure Pm = (Ps + Pd)/2. The visual field was tested under this pressure load by means of a subjective method and the visual evoked potential was derived under light and dark adaptation. Comparison of subjective and objective investigations demonstrated that the different visual evoked potentials which are dependent on the state of adaptation are a measure for the pressure sensibility of prelaminar optic nerve fibers.

Adaptation, Ocular↗
PubMed1975

[The alteration of the human ERG in light- and darkadapted state under normal and increased intraocular pressure (author's transl)].

Electroretinograms of 19 human eyes in light- and darkadapted state under normal and increased intraocular pressure (increased by a spring pressure dynamometer) were recorded (Pm = (Ps + Pd)/2). On physiological intraocular pressure the a-wave showed a low increase in amplitude after 25 min of dark adaptation, the b-wave a great one. After increasing the intraocular pressure no significant influence of the state of adaptation to the magnitude of the a- and b-wave could be found.

Adaptation, Ocular↗
PubMed1975

[The electrophysiological behavior of normal and glaucomatous human eyes with short term intraocular pressure elevation (author's transl)].

An electrophysiological study has been done on glaucomatous and normal eyes with briefly elevated intraocular pressure. There was no significant difference between the ERGs, but the changes in the VERs of glaucomatous eyes differed widely from those of normal eyes. This seems to be due to the high sensitivity to pressure of the prelaminary part of the optic nerve in glaucomatous eyes. Obviously this could be a method for the objective measurement of the sensitivity of the papillary vessels to raised intraocular pressure.

Blood Pressure↗