Document Detail


Are disposable prisms an adequate alternative to standard Goldmann tonometry prisms in glaucoma patients?
MedLine Citation:
PMID:  17011960     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
PURPOSE: To evaluate the accuracy and reliability of 2 single-use tonometry devices (Tonosafe and Tonojet) as an alternative to standard Goldmann prisms in patients attending dedicated glaucoma clinics. DESIGN: Prospective experimental study with human subjects. PARTICIPANTS: Two hundred forty glaucoma patients who attended 2 glaucoma clinics at the Stepping Hill Hospital between January and February 2005. METHODS: During each examination, intraocular pressure (IOP) was measured 3 times, using the standard Goldmann prism, Tonosafe, and Tonojet, respectively. The prism sequence was predetermined at random using a computer, and the measurements were taken at 5-minute intervals. Data were analyzed using the Bland-Altman method of differences. MAIN OUTCOME MEASURE: Intraocular pressure. RESULTS: Intraocular pressure ranged from 6 to 68 mmHg. Linear regression analysis indicated that there was a proportional bias between Goldmann and Tonosafe (r2 = 0.368, P<.001), especially for values higher than 25 mmHg. On the other hand, there was no statistically significant proportional bias between Goldmann and Tonojet (r2 = 0.006, P = 0.14). CONCLUSIONS: Caution should be exercised when using Tonosafe prisms in the presence of IOP higher than 25 mmHg. On the other hand, Tonojet is an adequate and useful alternative to the Goldman tonometer for glaucoma patients.
Authors:
Anna P Maino; Laurence H Morgan; Brian L Hercules; Andrew B Tullo
Publication Detail:
Type:  Comparative Study; Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  Ophthalmology     Volume:  113     ISSN:  1549-4713     ISO Abbreviation:  Ophthalmology     Publication Date:  2006 Oct 
Date Detail:
Created Date:  2006-10-02     Completed Date:  2006-10-13     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7802443     Medline TA:  Ophthalmology     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1837-41     Citation Subset:  IM    
Affiliation:
Royal Eye Hospital, Manchester, United Kingdom. a.maino@doctors.net.uk
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MeSH Terms
Descriptor/Qualifier:
Disposable Equipment*
Female
Glaucoma, Angle-Closure / diagnosis*
Glaucoma, Open-Angle / diagnosis*
Humans
Intraocular Pressure*
Male
Middle Aged
Ocular Hypertension / diagnosis
Prospective Studies
Reproducibility of Results
Tonometry, Ocular / instrumentation*,  standards*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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