Optic nerve head change in non-arteritic anterior ischemic optic neuropathy and its influence on visual outcome

Purpose To evaluate changes in cup/disc (C/D) diameter ratios and parapapillary atrophy in patients with non-arteritic anterior ischemic optic neuropathy (NA-AION), using morphometric methods. Methods The clinical non-interventional study included 157 patients with unilateral or bilateral NA-AION. O...

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Main Authors: Jonas, Jost B. (Author) , Papastathopoulos, Konstantinos I. (Author) , Rensch, Florian (Author)
Format: Article (Journal)
Language:English
Published: May 21, 2012
In: PLOS ONE
Year: 2012, Volume: 7, Issue: 5
ISSN:1932-6203
DOI:10.1371/journal.pone.0037499
Online Access:Verlag, kostenfrei, Volltext: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0037499
Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1371/journal.pone.0037499
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Author Notes:Jost B. Jonas, Scohan Singh Hayreh, Yong Tao, Konstantinos I. Papastathopoulos, Florian Rensch

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520 |a Purpose To evaluate changes in cup/disc (C/D) diameter ratios and parapapillary atrophy in patients with non-arteritic anterior ischemic optic neuropathy (NA-AION), using morphometric methods. Methods The clinical non-interventional study included 157 patients with unilateral or bilateral NA-AION. Optic disc photographs taken from both eyes at the end of follow-up were morphometrically examined. Results Follow-up was 86.3±70.3 months. Horizontal and vertical disc diameters (P = 0.30;P = 0.61, respectively), horizontal and vertical C/D ratios (P = 0.47;P = 0.19,resp.), and size of alpha zone and beta zone of parapapillary atrophy (P = 0.27;P = 0.32,resp.) did not differ significantly between affected eyes and contralateral normal eyes in patients with unilateral NA-AION. Similarly, horizontal and vertical disc diameters, horizontal and vertical C/D ratios, and size of alpha zone and beta zone did not vary significantly (all P>0.05) between the unaffected eyes of patients with unilateral NA-AION and the eyes of patients with bilateral NA-AION. Optic disc diameters, C/D ratios, size of alpha zone or beta zone of parapapillary atrophy were not significantly associated with final visual outcome in the eyes affected with NA-AION (all P>0.20) nor with the difference in final visual acuity between affected eyes and unaffected eyes in patients with unilateral NA-AION (all P>0.25). Conclusions NA-AION did not affect C/D ratios nor alpha zone and beta zone of parapapillary atrophy. Optic disc size was not related to the final visual acuity outcome in NA-AION. 
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