当前位置： SCI文献检索 > OPHTHALMOLOGY期刊下所有文献 > Retinal nerve fiber structure versus visual field function in patients with ischemic optic neuropathy. A test of a linear model.

Retinal nerve fiber structure versus visual field function in patients with ischemic optic neuropathy. A test of a linear model.

Abstract：

PURPOSE:To test a linear model relating the regional loss in retinal nerve fiber (RNFL) thickness to the corresponding regional loss in sensitivity with data from patients with previous anterior ischemic optic neuropathy (AION). DESIGN:Case-control study. PARTICIPANTS:Twenty-four individuals with AION and 20 with normal vision were tested. The time since the AION attack ranged from 5.2 months to more than 20.3 years (median, 2.95 years). METHODS:Eyes were tested with standard automated perimetry (SAP) and with optical coherence tomography (OCT), both RNFL thickness scans. The average RNFL thickness of the inferior and superior disc sectors was plotted against the average total deviations (linear units) of the corresponding superior and inferior arcuate field regions, and a linear model was fitted. According to the model, the RNFL thickness R=s(o)T+b, (1), where T is the relative SAP sensitivity loss (on a linear scale; e.g., for -3 dB, T = 0.5), s(o) is the RNFL thickness attributable to axons in the healthy or normal state (T = 1.0), and b is the residual RNFL measured when all sensitivity and axons are lost. MAIN OUTCOME MEASURES:Optical coherence tomography RNFL thickness and SAP sensitivity. RESULTS:The data from the AION patients resembled the data from glaucoma patients previously tested and were described by the linear model. For patients with SAP losses of more than -10 dB in the arcuate region, the RNFL thickness provided an estimate of residual RNFL thickness, b. The median value of b (45.5 microm) was similar to the value for patients with glaucoma. It varied among individuals (range, 30.4-63.3 microm), showing a very weak correlation with patient's age (r = 0.30) and the time since the AION episode (r = 0.26), but an excellent correlation (r(2) = 0.94; P<0.01) with the value of s(o), estimated from the unaffected eyes. CONCLUSIONS:The relationship between a structure (OCT RNFL thickness) and function (SAP sensitivity loss) is the same for patients with AION and glaucoma and can be approximated by a simple linear model. The model may provide a framework for identifying those patients with ganglion cell axons that are malfunctioning but are alive.

journal_name

Ophthalmology

journal_title

Ophthalmology

authors

Hood DC,Anderson S,Rouleau J,Wenick AS,Grover LK,Behrens MM,Odel JG,Lee AG,Kardon RH

doi

10.1016/j.ophtha.2007.06.001

subject

Has Abstract

pub_date

2008-05-01 00:00:00

pages

904-10

issue

eissn

0161-6420

issn

1549-4713

pii

S0161-6420(07)00634-3

journal_volume

115

pub_type

杂志文章

在线工具

Retinal nerve fiber structure versus visual field function in patients with ischemic optic neuropathy. A test of a linear model.