amblyopia and hallucinations
   Amblyopia is also known as 'lazy eye'. The term comes from the Greek noun ambluopia, which means weakness of vision. It is used to denote an indistinct or poor vision, usually -although not necessarily - limited to one eye. The lifetime prevalence of amblyopia is estimated to lie between 1 and 5%. Amblyopia may go unnoticed in milder cases, due to compensation by the stronger eye. Severe amblyopia, however, can present itselfin the form of diminished depth perception, diminished spatial acuity, diminished sensitivity to contrast, and in some cases reduced sensitivity to motion. Etiologically, amblyopia is associated with a variety of conditions, including visual deprivation early in life (as in developmental amblyopia), retrochiasmal lesions to the visual system (as in " cerebral amblyopia), and astigmatism (as in meridional amblyopia). In rare instances, amblyopia can be complicated by " visual hallucinations, referred to sometimes as " ophthalmopathic hallucinations. The term tobacco amblyopia is reserved for cases of diminished visual acuity due to extreme nicotine intoxication.
   References
   Mills, C.K., Camp, C.D. (1905). A case of visual hallucinations and crossed amblyopia with vascular and degenerative lesions in the cal-carine cortex and other portions of the occipital lobe; also with atrophy of the pregeniculae and optic tracts. American Journal of Insanity, 62, 77-84.
   Chua, B.E.-G., Johnson, K., Martin, F. (2004).
   A retrospective review of the associations between amblyopia type, patient age, treatment compliance and referral patterns. Clinical & Experimental Ophthalmology, 32, 175-179.

Dictionary of Hallucinations. . 2010.

Look at other dictionaries:

  • blindness and hallucinations —    Visual hallucinations occurring in individuals with impaired vision have been reported since ancient times. Perhaps the best known historical example is the description of Charles Lullin s * visual hallucinations, as rendered by his grandson… …   Dictionary of Hallucinations

  • cerebral amblyopia —    The term cerebral amblyopia is indebted to the Greek noun ambluopia, which means weakness of vision. It refers to a variant of * amblyopia, or diminished visual acuity, attributed to a lesion affecting the retrochiasmal part of the visual… …   Dictionary of Hallucinations

  • Charles Bonnet syndrome — (CBS)    The eponym Charles Bonnet syndrome (CBS) refers to the Swiss naturalist and philosopher Charles Bonnet (1720 1792). It was introduced in 1936 by the Swiss neurologist Georges de Mor sier (1894 1982) to denote a hallucinatory state or… …   Dictionary of Hallucinations

  • Riddoch's phenomenon —    Also known as Riddoch syndrome and statico kinetic dissociation. Both terms are used to denote a blindness to stationary light stimuli, combined with an unaffected conscious perception of moving light stimuli. Riddoch s phenomenon is… …   Dictionary of Hallucinations

  • Atropine — Systematic (IUPAC) name …   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

  • Coats' disease — Classification and external resources Clinical photography of patient with Coats disease, showing conjunctival hyperemia, mild corneal edema, posterior synechiae and cataract. ICD …   Wikipedia

  • Absinthe — Once a major medical hazard, absinthe is an emerald green liqueur flavored with extracts of the wormwood plant, licorice and aromatic flavorings in a alcohol base. Absinthe was manufactured, commercialized and popularized in France in the late… …   Medical dictionary

  • Cortical blindness — Classification and external resources ICD 10 H47.6 ICD 9 377.75 …   Wikipedia

Share the article and excerpts

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