Manor R S
Neuro-Ophthalmologic Unit, Beilinson Medical Center, Petah Tikva, Israel.
Am J Ophthalmol. 1989 Nov 15;108(5):585-91. doi: 10.1016/0002-9394(89)90439-x.
With splitting of macula by perimetry, the entopic phenomena (the perception of one's own foveal xanthophilic pigment and macular vessel leukocytes) were utilized to study the character of macular sparing or splitting in patients with pregeniculate or postgeniculate hemianopsia. In the pregeniculate group, 11 of 14 eyes perceived the Haidinger brushes figure as a half circle corresponding to the perimetric macular splitting, whereas flying corpuscles were not perceived at all or were less numerous on the hemianoptic side than on the normal field side. In contrast, six of seven patients with postgeniculate lesions perceived the Haidinger brushes figure as a complete circle, four of six perceived fewer flying corpuscles on the hemianoptic side than on the normal field side, and two patients reported perceiving an equal number in all quadrants. This study indicated that in pregeniculate hemianopsia there is usually a true splitting of the macula, whereas in postgeniculate hemianopsia, there is some macular sparing even when perimetry shows macular splitting.
通过视野检查法对黄斑进行分割，利用内视现象（对自身中央凹嗜黄质色素和黄斑血管白细胞的感知）来研究膝状体前或膝状体后偏盲患者黄斑保留或分割的特征。在膝状体前组中，14只眼中有11只将海丁格刷状图形感知为与视野检查黄斑分割相对应的半圆，而在偏盲侧完全未感知到游动微粒或其数量比正常视野侧少。相比之下，7例膝状体后病变患者中有6例将海丁格刷状图形感知为完整的圆，6例中有4例在偏盲侧感知到的游动微粒比正常视野侧少，2例患者报告在所有象限中感知到的数量相等。这项研究表明，在膝状体前偏盲中通常存在真正的黄斑分割，而在膝状体后偏盲中，即使视野检查显示黄斑分割，也存在一些黄斑保留。
