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Location of visual field defect and optic disc assessment by confocal scanning laser ophthalmoscope in early normal tension glaucoma
Author(s) -
JUNG KI,
PARK CK
Publication year - 2011
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.2011.2253.x
Subject(s) - ophthalmology , glaucoma , normal tension glaucoma , visual field , optic disc , medicine , absolute deviation , intraocular pressure , standard deviation , open angle glaucoma , mathematics , statistics
Purpose To compare topographic optic disc measurements in patients with central 10‐degree and outer arcuate visual field (VF) defects in early normal tension glaucoma (NTG) Methods Early NTG patients with a mean deviation of ‐10 dB or better in 24‐2 Humphrey VF analyzer, and glaucomatous optic disc were included in this retrospective study. Patients were divided into central VF defect group (CFD) with VF defect in 10‐degree radius in total deviation plot and peripheral VF defect group (PFD) with outer arcuate VF defect. Global and sectoral optic disc stereometric parameters were obtained with the Heidelberg Retina Tomograph (HRT) III and compared between CFD and PFD group. Mean deviation (MD) of central and nasal peripheral 12 points in mean deviation plot compared between superior and inferior hemifields in both groups. Results Mean deviation and pattern standard deviation values showed no significant difference between 27 patients in the CFD group and 29 patients in the PFD group. The cup area, cup disc area ratio was significantly decreased in CFD group compared to PFD group only in inferotemporal sector, not in other sectoral parameters and global parameters of HRT. The MD of VF in the CFD group was significantly decreased in superior central 6 points (‐9.23±8.12 dB) compared to inferior central 6 points (‐3.36±4.18 dB). The MD of VF in the PFD group showed no significant difference between superior (‐5.24±6.06 dB) and inferior (‐8.10±6.42 dB) nasal peripheral 6 points. Conclusion The change of optic disc in early NTG was more localized in the CFD group than the PFD group and central VF defect was more prominent in the superior hemifield.