Association between watershed zone and visual field defect in normal tension glaucoma.
OBJECTIVE
To evaluate the association between the watershed zone and glaucomatous optic nerve head (ONH) damage.


METHODS
We performed indocyanine green fluorescence angiography with a scanning laser ophthalmoscope in 54 eyes of 27 patients with normal tension glaucoma (NTG).


RESULTS
We identified 7 eyes of 8 patients (14.8%) with a watershed zone not including the ONH, 32 eyes of 20 patients (59.3%) with the watershed zone partially including the ONH, and 10 eyes of 14 NTG patients (25.9%) with the watershed zone including the ONH. Of the 27 NTG patients, 10 patients (37.0%) had different types in each eye.


CONCLUSIONS
In these patients, the mean deviation of visual field indices was greater in the eye with the watershed zone, which included a larger part of the ONH than in the contralateral eye. Conversely, the eye with the greater mean deviation had a watershed zone that included a larger part of the ONH. The location of the watershed zone appeared to influence the progression of the visual field defect.
Sato
Y
Y
Department of Ophthalmology, Gifu University School of Medicine, Gifu-ken, Japan.
Tomita
G
G
Onda
E
E
Goto
Y
Y
Oguri
A
A
Kitazawa
Y
Y
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002908:Chronic Disease; D004396:Coloring Agents; D018450:Disease Progression; D005260:Female; D005451:Fluorescein Angiography; D005654:Fundus Oculi; D005902:Glaucoma, Open-Angle / Q000150:complications* / Q000175:diagnosis / Q000503:physiopathology; D006801:Humans; D007208:Indocyanine Green; D007429:Intraocular Pressure; D008297:Male; D008875:Middle Aged; D009887:Ophthalmoscopy / Q000379:methods; D009898:Optic Disk / Q000098:blood supply*; D009901:Optic Nerve Diseases / Q000150:complications*; D014741:Video Recording; D014786:Vision Disorders / Q000150:complications*; D058609:Visual Field Tests / Q000379:methods; D014794:Visual Fields
D004396:Coloring Agents; D007208:Indocyanine Green