- This topic has 1 reply, 2 voices, and was last updated 1 month, 3 weeks ago by
.
-
Posts
-
-
This slide really began to confuse me a little bit but I am trying to make sure I have this correct in the stroke module it says a right optic tract lesion results in left homonymous hemianopsia which is Loss of vision in the left visual field (temporal field of the left eye, nasal field of the right eye). However, as I am studying is this not incorrect? If there is loss of vision in the left visual field shouldn’t it be left nasal and right temporal fields ?
-
Hi Hakeem,
The medial portion of the eye contains the ipsilateral nasal visual field (i.e., the RIGHT nasal visual field is observed through the medial portion of the RIGHT eye). The lateral portion of the eye contains the contralateral temporal visual field (i.e., the RIGTH temporal visual field is observed through the LEFT lateral eye). This is shown in the graphic on the first few visual field deficit slides.
The right optic tract contains fibers from the lateral portion of the right eye (left temporal visual field) and the medial left eye (left nasal visual field). Therefore, a lesion to the right optic tract causes left homonymous hemianopsia.
Chrissy
-
- You must be logged in to reply to this topic.