[Application of frequency doubling technology perimetry in the diagnosis of glaucoma].

PURPOSE

Evaluation of the frequency doubling technology perimetry in the detection of an early glaucomatous field loss.

MATERIAL AND METHODS

Twenty-two patients (40 eyes), who were diagnosed with ocular hypertension were enrolled in the study. The diagnosis was made based on slit lamp examination, 3 measurements of intraocular pressure (IOP) over 21 mmHg. Standard perimetry was performed with Humphrey perimeter and SITA program (30-2 threshold). Then, all patients underwent FDT perimetry with 30-2 threshold program. Patients, who had any changes in FDT visual field had to repeat the test, to confirm the results.

RESULTS

Out of 40 eyes with the normal white on white perimetry 5 eyes (5 patients) presented defects in FDT perimetry. They had optic disc c/d asymmetry > 0.1 and the nerve fiber layer defects corresponding to the visual field defects in FDT perimetry.

CONCLUSION

Frequency Doubling Technology perimetry may be useful as a supplemental method of the visual field evaluation, particularly in patients where standard perimetry does not show any functional damage.