A clear & concise explanation of the responses of each eye in both afferent and efferent defects of the pupillary light reflex pathway Pupillary light reflex pathway • Pupil 1 | Pupillary li...
Mam 1)Why the pupil in ARGYLL ROBERTSON PUPIL is usually constricted? 2) Does pretectal nucles have inhibitory influence of Edinger westphal nucleus? Please help!
eyewiki.aao.org/Argyll_Robertson_Pupils You have a very valid & interesting doubt, Naveen. I am pasting the relevant portion from the link above to answer your question “Damage to the rostral midbrain can result in AR pupils. Specifically, a lesion of the dorsal aspect of the Edinger-Westphal nucleus can interrupt the pretectal oculomotor light reflex fibers. However, the more ventrally located fibers of the Edinger-Westphal nuclei that control the near reaction are spared. Supranuclear adrenergic fibers that inhibit the Edinger-Westphal nucleus are necessary for iris sphincter relaxation and pupil dilation. When this inhibitory pathway is disrupted, parasympathetic neurons of the Edinger-Westphal nucleus that naturally fire at a high rate can lead to sustained pupil contraction by the iris sphincter and cause miosis in AR pupils.”
@@ophthalmologypearls Thank u ma'am It will be very helpful if u could cover visual field defects in neuroophthal as well with relevant anatomy Thank u ma'am
All the situations mentioned here are serious conditions, some of which are temporary and others are permanent. What I described are just manifestations of a wide range of diseases.
