PubMed Health⌕ Search

Biomedical subjects

S Levedag

Publications and source records attributed to S Levedag.

3 recordsLinked to original sources
PubMed1987

[Automatic measurement of intraocular pressure with an electronic sensor tonometer].

Applanation tonometry based on Imbert-Flick's law and calibrated by Goldmann for clinical application is generally performed today with a standard diameter of the applanation surface of 3.06 mm. This diameter is determined optically by the examiner; the force required for applanation is the measured variable. With electronic, nonoptical definition of the applanation area a reading which cannot be falsified by an error on the part of the examiner can be obtained automatically and considerably faster.

Animals↗
PubMed1987

Nonoptical definition of applanation surface.

Based on the Imbert-Fick law and the theoretical considerations of Goldmann, new applanation tonometers were designed, still using an applanation diameter of 3.06 mm to avoid a new biometric calibration. Three different electronic recording devices were used for the area assessment. An optical, a capacitance and a digital line sensor were tested in first calibration experiments.

Animals↗