Abstract:
PURPOSE:To investigate in open-angle glaucoma the focal macular photopic negative response and spectral-domain optical coherence tomography measurements of retinal thicknesses in the superior and inferior macula. DESIGN:Comparative case series. METHODS:We studied 63 eyes of 63 patients with open-angle glaucoma and 41 normal eyes of 41 volunteers. Photopic negative responses were recorded using a spotlight (diameter of 15 degrees of circle), projected onto the whole or superior or inferior macula. Ganglion cell complex (nerve fiber + ganglion cell + inner plexiform layers) thickness was measured using spectral-domain optical coherence tomography. RESULTS:Mean photopic negative response amplitude over the entire macula was significantly (P < .001) decreased compared with that of controls in eyes with early (n = 24; to 62.1%), moderate (n = 21; to 57.2%), and severe (n = 18; to 49.3%) open-angle glaucoma, but not significantly different among eyes with various stages of glaucoma. Mean ganglion cell complex thickness was significantly (P < .001) decreased compared with that of controls in eyes with early (86.0%), moderate (78.3%), and severe (71.2%) glaucoma, and thinning correlated positively with glaucoma severity (P < .001). Mean photopic negative response amplitude correlated significantly (P < .001) with ganglion cell complex thickness over the whole, superior, and inferior macular areas (r = 0.57 to 0.74). In 16 eyes without visual field defect in the inferior hemifield, mean photopic negative response amplitude was 56.5% of normal (P < .001), and mean ganglion cell complex thickness in the superior macula was 92.1% of normal (P = .004). CONCLUSIONS:Focal macular photopic negative response amplitude correlates with ganglion cell complex thickness, but decreases more abruptly in early glaucoma compared with ganglion cell complex thickness.
journal_name
Am J Ophthalmoljournal_title
American journal of ophthalmologyauthors
Nakamura H,Hangai M,Mori S,Hirose F,Yoshimura Ndoi
10.1016/j.ajo.2010.09.018subject
Has Abstractpub_date
2011-03-01 00:00:00pages
494-506.e1issue
3eissn
0002-9394issn
1879-1891pii
S0002-9394(10)00731-2journal_volume
151pub_type
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