Nesaratnam N, Thomas P, Vivian A
Department of Ophthalmology, Addenbrooke's Hospital, Cambridge, UK.
Eye (Lond). 2017 Oct;31(10):1503-1506. doi: 10.1038/eye.2017.97. Epub 2017 Jun 2.
IntroductionDissociated tests of strabismus provide valuable information for diagnosis and monitoring of ocular misalignment in patients with normal retinal correspondence. However, they are vulnerable to operator error and rely on a fixed head position. Virtual reality headsets obviate the need for head fixation, while providing other clear theoretical advantages, including complete control over the illumination and targets presented for the patient's interaction.PurposeWe compared the performance of a virtual reality-based test of ocular misalignment to that of the traditional Lees screen, to establish the feasibility of using virtual reality technology in ophthalmic settings in the future.MethodsThree patients underwent a traditional Lees screen test, and a virtual reality headset-based test of ocular motility. The virtual reality headset-based programme consisted of an initial test to measure horizontal and vertical deviation, followed by a test for torsion.ResultsThe pattern of deviation obtained using the virtual reality-based test showed agreement with that obtained from the Lees screen for patients with a fourth nerve palsy, comitant esotropia, and restrictive thyroid eye disease.ConclusionsThis study reports the first use of a virtual reality headset in assessing ocular misalignment, and demonstrates that it is a feasible dissociative test of strabismus.
引言
斜视的分离性检查为诊断和监测视网膜对应正常患者的眼位偏斜提供了有价值的信息。然而，这些检查容易受到操作者误差的影响，并且依赖于固定的头部位置。虚拟现实头显消除了头部固定的需求，同时还具有其他明显的理论优势，包括完全控制为患者交互呈现的照明和目标。
目的
我们将基于虚拟现实的眼位偏斜测试与传统的李斯屏测试的性能进行比较，以确定未来在眼科环境中使用虚拟现实技术的可行性。
方法
三名患者接受了传统的李斯屏测试和基于虚拟现实头显的眼球运动测试。基于虚拟现实头显的程序包括一个测量水平和垂直偏差的初始测试，随后是一个扭转测试。
结果
对于患有第四神经麻痹、共同性内斜视和限制性甲状腺眼病的患者，使用基于虚拟现实的测试获得的偏差模式与从李斯屏获得的偏差模式一致。
结论
本研究报告了首次使用虚拟现实头显评估眼位偏斜，并证明它是一种可行的斜视分离性检查。
