Evaluation of the high specificity Screening Program (C-20-1) of the Frequency Doubling Technology (FDT) perimeter in clinical practice.
Eye (Lond)
; 20(6): 681-7, 2006 Jun.
Article
in En
| MEDLINE
| ID: mdl-15999135
ABSTRACT
AIMS:
To compare the efficacy of the high specificity Frequency Doubling Technology (FDT) Perimeter Screening Program (C-20-1) to standard threshold automated perimetry in the diagnosis of open-angle glaucoma.METHODS:
A total of 100 consecutively presenting patients attending a glaucoma clinic who volunteered for the study (approximately 30% of whom were attending for an initial visit) were examined with the FDT C-20-1 Screening Program and with the Humphrey Field Analyzer (HFA) SITA Fast algorithm and Program 24-2.RESULTS:
Of the patients, 17 were excluded due to unreliable visual field results or non-glaucomatous ocular abnormalities. In all, 10 patients were diagnosed as normal, 54 with open-angle glaucoma, eight with ocular hypertension, and 11 as glaucoma suspects. Of the 54 glaucomatous patients, 45 exhibited high-tension glaucoma and nine normal tension glaucoma. Perimetry with the HFA gave a sensitivity of 81.5% for the combined category of glaucoma and glaucoma suspect and a specificity of 83.3% for the combined category of normal and ocular hypertension. Perimetry with the FDT gave a sensitivity of 74.5% and a specificity of 85.2% compared to that of the HFA.CONCLUSION:
In the detection of glaucoma, Program C-20-1 of the FDT perimeter exhibits high specificity. It exhibits low sensitivity for the detection of mild loss but high sensitivity for advanced field loss relative to Program 24-2 and the SITA Fast algorithm of the HFA.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Vision Screening
/
Glaucoma, Open-Angle
Type of study:
Clinical_trials
/
Diagnostic_studies
/
Evaluation_studies
/
Screening_studies
Limits:
Aged
/
Aged80
/
Humans
/
Middle aged
Language:
En
Journal:
Eye (Lond)
Journal subject:
OFTALMOLOGIA
Year:
2006
Document type:
Article
Affiliation country:
United kingdom