A technique for standardizing disk foveal angle measurement.
Ocular torsion can been measured by perimetry, double Maddox rod, Bagolini glasses, indirect ophthalmoscopy lens, slit-lamp biomicroscopy, synoptophore, and fundus photography. Wide variations have been reported in the measurement of the disk foveal angle (DFA) using fundus photography. We describe a technique for measuring the DFA, formed by a horizontal line extending from the center of the optic disk and a line from the center of disk to the fovea, using Microsoft PowerPoint and ImageJ software.
Dr. T V Patel Eye Institute, Vadodara, India.
Jitendra
J
Jethani
Dr. T V Patel Eye Institute, Vadodara, India. Electronic address: paaraj@gmail.com.
Paaraj
P
Dave
D000293:Adolescent; D000328:Adult; D003430:Cross-Sectional Studies; D003941:Diagnostic Techniques, Ophthalmological / Q000592:standards; D006801:Humans; D015588:Observer Variation; D009898:Optic Disk / Q000473:pathology*; D009901:Optic Nerve Diseases / Q000175:diagnosis*; D011446:Prospective Studies; D014102:Torsion Abnormality / Q000175:diagnosis*; D055815:Young Adult