Binasal hemianopsia

Binasal hemianopsia

DiseaseDisorder infobox
ICD10 = ICD10|H|53|4|h|53
ICD9 = ICD9|368.47

Caption = Paris as seen with binasal hemianopsia
MedlinePlus =
eMedicineSubj =
eMedicineTopic =
DiseasesDB =

Binasal hemianopsia (or Binasal hemianopia) is the medical description of a type of partial blindness where vision is missing in the inner half of both the right and left visual field. It is associated with certain lesions of the eye and of the central nervous system, such as congenital hydrocephalus.


The absence of vision in half of a visual field is described as "hemianopsia".

The visual field of each eye can be divided in two vertically, with the outer half being described as "temporal", and the inner half being described as "nasal".

"Binasal hemianopsia" can be broken down as follows:
*"bi-": involves both left and right visual fields
*"nasal": involves the nasal visual field
*"hemi-": involves half of each visual field
*"anopsia": blindness


In binasal hemianopsia, vision is missing in the inner (nasal or medial) half of both the right and left visual fields. Information from the nasal visual field falls on the temporal (lateral) retina. Those lateral retinal nerve fibers do not cross in the optic chiasm. Calcification of the internal carotid arteries can impinge the uncrossed, lateral retinal fibers leading to loss of vision in the nasal field.

ee also

* Bitemporal hemianopsia
* Homonymous hemianopsia

External links


Wikimedia Foundation. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • Hemianopsia — is the loss of half the vision in both eyes. More specifically, it can refer to:* Binasal hemianopsia * Bitemporal hemianopsia * Homonymous hemianopsiaEtymologyHemi an opsia …   Wikipedia

  • Hemianopsia — Se conoce como hemianopsia a la falta de visión o ceguera que afecta únicamente a la mitad del campo visual. Puede estar producida por lesiones en el ojo, el nervio óptico o la corteza cerebral. Cada tipo de hemianopsia sugiere diferentes… …   Wikipedia Español

  • hemianopsia binasal — Eng. Binasal hemianopsia Hemianopsia heterónima en la que se afecta el campo visual nasal de cada ojo. Hemianopsia heterónima binasal …   Diccionario de oftalmología

  • hemianopsia heterónima binasal — Eng. Binasal heteronymous hemianopsia Ver hemianopsia binasal …   Diccionario de oftalmología

  • Homonymous hemianopsia — Infobox Disease Name = PAGENAME Caption = Paris as seen with left homonymous hemianopsia DiseasesDB = ICD10 = ICD10|H|53|4|h|53 ICD9 = ICD9|368.46 ICDO = OMIM = MedlinePlus = eMedicineSubj = eMedicineTopic = MeshID = Homonymous hemianopsia is a… …   Wikipedia

  • Bitemporal hemianopsia — DiseaseDisorder infobox Name = PAGENAME ICD10 = ICD10|H|53|4|h|53 ICD9 = ICD9|368.47 ICDO = Caption = Paris as seen with bitemporal hemianopia OMIM = MedlinePlus = eMedicineSubj = eMedicineTopic = DiseasesDB = Bitemporal hemianopsia (or… …   Wikipedia

  • Visual field — The term visual field is sometimes used as a synonym to field of view, though they do not designate the same thing. The visual field is the spatial array of visual sensations available to observation in introspectionist psychological experiments …   Wikipedia

  • Campo visual — Saltar a navegación, búsqueda El campo visual es la porción del espacio que el ojo es capaz de ver. El examen del campo visual permite determinar sus límites para cada ojo. Diferentes enfermedades oftalmológicas o cerebrales pueden ocasionar… …   Wikipedia Español

  • Blindness — This article is about the visual condition. For other uses, see Blindness (disambiguation). Blindness Classification and external resources A white cane, the international symbol of blindness ICD …   Wikipedia

  • Color blindness — Colorblind and Colourblind redirect here. For other uses, see Colorblind (disambiguation). Color blindness or color deficiency Classification and external resources An 1895 illustration of normal vision and various kinds of color blindness …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”