PURPOSE: The authors prospectively compare perimetric results obtained by conventional differential light sensitivity (DLS) perimetry and frequency-doubling perimetry ( @entity4568 ) in normal-tension @entity726 (NTG) with a hemifield @entity227 , assuming that some of these eyes already have early glaucomatous changes in the "intact" hemifield. METHODS: Eleven eyes of 11 @entity1 with NTG who met the enrollment criteria were studied. Seven eyes had an upper @entity154 and four had a @entity154 , determined by DLS with a Humphrey Field Analyzer (Zeiss-Humphrey, Inc., San Leandro, CA, U.S.A.). Frequency-doubling perimetry and DLS perimetry were conducted less than 7 days apart. To quantitatively detect @entity129 ( @entity129 ), scanning laser ophthalmoscopy was also performed. RESULTS: Of the 11 intact hemifields, seven showed @entity129 . Of the seven, six also showed @entity227 by @entity4568 . Of the four eyes without @entity129 , two showed no defects in the intact hemifield by @entity4568 . The threshold values of @entity4568 and DLS perimetry did not significantly correlate in either the intact or the defective hemifields, or in the total field. The average test time of @entity4568 was approximately 6 minutes. CONCLUSIONS: Frequency-doubling perimetry may detect early glaucomatous @entity227 .

A frequency-doubling perimetric study in normal-tension @entity726 with XXXX .

@entity4568 :: ('MESH:C020332', 'Chemical') :: ['FDP'] @entity1 :: ('9606', 'Species') :: ['patients'] @entity227 :: ('MESH:D014786', 'Disease') :: ['visual field defect', 'visual field defects'] @entity154 :: ('MESH:D000013', 'Disease') :: ['lower defect', 'hemifield defect'] @entity129 :: ('MESH:D003389', 'Disease') :: ['NFLD', 'nerve fiber layer defect'] @entity726 :: ('MESH:D005901', 'Disease') :: ['glaucoma']
@entity154 :: (MESH:D000013,Disease) :: ['hemifield defect']
