Fehlerquellen bei der Goldmann-Applanationstonometrie

Autor:	F. Rüfer
Rok vydání:	2011
Předmět:	Intraocular pressure medicine.medical_specialty Slit lamp genetic structures business.industry medicine.medical_treatment Blepharospasm LASIK Glaucoma Astigmatism medicine.disease eye diseases Ophthalmology medicine Valsalva maneuver sense organs medicine.symptom business Corneal stromal edema
Zdroj:	Der Ophthalmologe. 108:546-552
ISSN:	1433-0423 0941-293X
Popis:	Reliable measurements of the intraocular pressure (IOP) are necessary for glaucoma patients. The measuring procedure, anatomical changes of the eye or extraocular influences can lead to errors during applanation tonometry. The IOP is overestimated if measured through the wrong eyepiece of the slit lamp, if a force is interfering with the tonometer arm during the measurement, if the lid comes into contact with the tonometer tip, if blepharospasm occurs, if there is lid retraction or if a Valsalva maneuver is present. An underestimation of the IOP occurs if staining with fluorescein is absent or insufficient, if the illumination is not bright enough, if a corneal stromal edema is present, after LASIK, during accommodation, during repeated measures within a few minutes or during systemic blood pressure drop. Discrepancies of the IOP in both directions can appear if the calibration of the tonometer is irregular, if abnormal central corneal thickness or astigmatism is present. For correct measurements calibrations are advised once or twice a year.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::88b9c081d73723fa3fe5ecc36c83b03c https://doi.org/10.1007/s00347-011-2370-5 Zobrazit plný text záznamu Full text from SpringerLink