[A study of high-pass resolution perimetry in the early diagnosis of primary open-angle glaucoma].

OBJECTIVE

To evaluate the application of high-pass resolution perimetry (HRP) in detecting the early visual field loss of glaucoma.

METHOD

According to the method described by Frisén, we developed HRP in a personal computer. The HRP was used to examine the visual field of 22 normal subjects (44 eyes), 27 cases (41 eyes) of primary open-angle glaucoma (POAG) with abnormal automated visual fields and 10 cases (13 eyes) of early POAG or suspected POAG with normal automated visual fields.

RESULTS

The mean resolution threshold in the normal subjects was 3.96+/- 0.55db in the right eyes and 3.98+/- 0.55dB in the left eyes. It is demonstrated that HRP was more sensitive than automated perimetry in detecting the glaucomatous visual field defects, its sensitivity was 93.75% and specificity was 97.7%. The early visual field loss of glaucoma might present increment of the retinal resolution threshold.

CONCLUSION

HRP is a relatively sensitive method for the detection of the early visual field loss in POAG, and it can be used extensively.