The Ability of Disc-to-Fovea Distance to Disc-Diameter Ratio to Estimate Optic Disc Size
Journal of the Korean Ophthalmological Society
;
: 913-918, 2013.
Article
in Korean
| WPRIM
| ID: wpr-160298
ABSTRACT
PURPOSE:
To investigate the usefulness of the measurement of disc-to-fovea distance to disc-diameter ratio (DF/DD ratio) in detecting large and small discs.METHODS:
A total of 300 randomly selected subjects were included in the present study. All patients underwent stereoscopic disc photography and DF/DD ratio, which is the shortest distance between disc margin and fovea divided by mean disc diameter was determined by planimetry. The diagnostic accuracy of DF/DD ratio was evaluated using areas under the receiver operating characteristics curves (AUCs), sensitivity, and specificity.RESULTS:
No significant differences in disc-to-fovea distance were observed among small and large disc groups. The DF/DD ratio was significantly lower in subjects with large discs (1.74 +/- 0.27) compared with subjects with small discs (2.70 +/- 0.15). AUCs of the DF/DD ratio were 0.942 and 0.947 in detecting large and small discs, respectively. In detecting disc size by a fixed DF/DD ratio of 2.0, sensitivity was 100% for both large and small discs, and specificity was 70.1% and 40.9% for the large and small discs, respectively.CONCLUSIONS:
The DF/DD ratio may be a simple and useful clinical aid in detecting large and small discs. The 2.0 fixed DF/DD ratio, showed 100% sensitivity in detecting both large and small discs, although medium discs may be misdiagnosed as small discs more often than as large discs.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Photography
/
ROC Curve
/
Sensitivity and Specificity
/
Area Under Curve
Type of study:
Diagnostic study
/
Prognostic study
Limits:
Humans
Language:
Korean
Journal:
Journal of the Korean Ophthalmological Society
Year:
2013
Type:
Article
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