Talbot E M, Murdoch J R, Keating D
Tennent Institute of Ophthalmology, Western Infirmary, Glasgow.
Eye (Lond). 1992;6 ( Pt 3):322-5. doi: 10.1038/eye.1992.64.
The Purkinje vascular entoptic test is a test of macular function which employs a light directed through the sclera illuminating the fundus. This light casts shadows of retinal blood vessels on to posterior pole photoreceptors. When the light source is moved, a patient with a good macular function should be able to see a negative image of his or her retinal blood vessels. We evaluated the Purkinje test in eyes with clear ocular media. A bright 3.5 watt halogen rechargeable transilluminator was used instead of a pen torch as previously described. Sixty-eight patients (129 eyes) attending a diabetic eye clinic, were tested. The test correctly identified 91% of eyes with good macular function and 77% of eyes with poor macular function (visual acuity 6/24 or poorer). If a vascular pattern was seen, it was probable (0.89) that good macular function was present. If no vascular pattern was seen, it was probable (0.80) that the eye had poor macular function (chi 2 = 60.14, P = < 0.001). Our results were superior to those previously reported. We attribute the increased accuracy of our test to the brighter light source used.
浦肯野血管内视测试是一项黄斑功能测试，该测试通过引导光线穿过巩膜来照亮眼底。此光线会在视网膜血管上投射阴影至后极部光感受器。当光源移动时，黄斑功能良好的患者应能看到其视网膜血管的负像。我们对眼内介质清晰的眼睛进行了浦肯野测试。使用了一个明亮的3.5瓦可充电卤素透照器，而不是先前描述的手电筒。对68名（129只眼）就诊于糖尿病眼科门诊的患者进行了测试。该测试正确识别出91%黄斑功能良好的眼睛和77%黄斑功能较差（视力6/24或更差）的眼睛。如果看到血管图案，则很可能（概率为0.89）存在良好的黄斑功能。如果未看到血管图案，则很可能（概率为0.80）该眼黄斑功能较差（卡方检验χ2 = 60.14，P = < 0.001）。我们的结果优于先前报道的结果。我们将测试准确性的提高归因于所使用的更亮的光源。
