单眼垂直棱镜分离试验。

The monocular vertical prism dissociation test.

作者信息

Golnik Karl C, Lee Andrew G, Eggenberger Eric R

机构信息

Department of Ophthalmology, Neurology, Neurosurgery, University of Cincinnati and The Cincinnati Eye Institute, Cincinnati, Ohio, USA.

出版信息

Am J Ophthalmol. 2004 Jan;137(1):135-7. doi: 10.1016/s0002-9394(03)00865-1.

DOI:10.1016/s0002-9394(03)00865-1

PMID:14700656

Abstract

PURPOSE

To determine if the monocular vertical prism dissociation test can differentiate between organic and nonorganic visual loss.

DESIGN

A prospective, single-masked observational study.

METHODS

Three institutional neuro-ophthalmology practices. Group 1 consisted of 30 normal controls. Group 2 included 30 patients with known organic visual loss. Group 3 contained 35 patients with suspected nonorganic monocular visual loss. Participants were asked to describe what they saw while viewing a single Snellen letter when a 4-prism diopter base-down prism was placed in front of their better eye. Outcome was measured by whether the participant sees one or two letters with the prism in place.

RESULTS

Vision-appropriate results were given by all members of Group 1 (two images) and by all members of Group 2 (one image). Two images were seen by 31 of 35 members of Group 3, indicating nonorganic visual loss. The other 4 subjects in Group 3 saw one image; each was subsequently found to have occult pathology.

CONCLUSION

The vertical prism test quickly differentiates organic from nonorganic monocular visual acuity loss.

摘要

目的

确定单眼垂直棱镜分离试验能否区分器质性和非器质性视力丧失。

设计

一项前瞻性、单盲观察性研究。

方法

三个机构的神经眼科诊所。第1组由30名正常对照者组成。第2组包括30名已知有器质性视力丧失的患者。第3组包含35名疑似非器质性单眼视力丧失的患者。当在参与者较好的眼前放置一个4棱镜度底向下的棱镜时，要求他们描述在观看单个斯内伦字母时所看到的情况。通过参与者在棱镜放置到位时看到一个还是两个字母来衡量结果。