Objective: To evaluate the use of the non-mydriatic fundus camera in evaluation of optic nerve head vertical cup to disc ratio in glaucoma patients.
Design: Cross-sectional descriptive comparative study
Material and Method: Indirect ophthalmoscopy
with 78 diopter lens and a digital non-mydriatic
fundus camera were performed in forty two subjects
(23 normal controls and 19 glaucoma). The
estimated vertical cup to disc ratio (VCDR) from
both methods were analyzed. The effect of the
pupillary dilation on the estimation of VCDR from
non-mydriatic fundus camera was also determined.
Result: The mean ophthalmoscopically estimated
VCDR was (mean ? SD) 0.479 ? 0.18, compared
with a VCDR of (mean ? SD) 0.462 ? 0.18,
measured with the non-mydriatic fundus camera
(difference 0.017; 95% confidence interval [CI],
0.005-0.028; p=0.007). The overall correlation
between the non-mydriatic fundus camera and
indirect ophthalmoscopy with 78 D lens is 0.895
(p<0.001). From the receiver operating curve (ROC)
at 90% specificity, the estimated VCDR from the
non-mydriatic fundus camera yielded 68.4%
Conclusion: The non-mydriatic fundus camera
provided good correlation with minimal difference
in the estimated VCDR, when compared with the
standard indirect ophthalmoscopy with a 78 D lens.
In conjunction with IOP measurement, a
non-mydriatic fundus camera can make a useful
tool for glaucoma screening.