[Intraocular pressure measurements with the Proview self-tonometer in comparison of Goldmann applanation tonometry in healthy and glaucomatous eyes].
BACKGROUND
The aim of this study was to compare the results of intraocular pressure (IOP) measurements obtained using the pressure phosphene tonometer Proview with those from Goldmann applanation tonometer (GAT) in normal and glaucomatous eyes.


METHODS
The IOP in 150 eyes of 62 healthy volunteers and 88 patients with glaucoma or ocular hypertension was measured prospectively in a sitting position. After being trained to use the Proview device, Goldmann applanation tonometry was performed first. Then the patient took a reading with the Proview self-tonometer.


RESULTS
For all investigated eyes the measurements with the Proview were on average 5.5 mmHg higher than those by GAT. Only 34 % of the readings from the two devices were within a difference range of +/- 3 mmHg. On comparing the group of glaucomatous patients with slight visual field defects with the group of healthy subjects and patients with ocular hypertension without visual field defects we determined almost the same mean difference between the Proview and GAT (mean difference in the group with visual field defects = 4.7 +/- 4.1 mmHg; without defects = 4.8 +/- 2.9 mmHg).


CONCLUSIONS
The tonometer Proview did not show a close agreement to GAT. Therefore, the PPT does not offer an alternative method for measuring IOP. We do not recommend the Proview for self-tonometry at home or for clinical management of patients with glaucoma. Slight visual field defects seem to have no influence on intraocular pressure measurement with the self-tonometer.
Meyer
M W
MW
Augenklinik der Medizinischen Hochschule Hannover, Carl-Neuberg-Strasse 1, 30625 Hannover. drmichaelmeyer@web.de
Yevelenko
V
V
Hoy
L
L
Meyer
A
A
Erb
C
C
D000293:Adolescent; D000328:Adult; D000368:Aged; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005260:Female; D005901:Glaucoma / Q000175:diagnosis* / Q000503:physiopathology*; D006801:Humans; D007429:Intraocular Pressure; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D012648:Self Care / Q000295:instrumentation* / Q000379:methods; D012680:Sensitivity and Specificity; D014065:Tonometry, Ocular / Q000295:instrumentation* / Q000379:methods*