Difference between revisions of "Cataracts - Donkey"
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==Introduction== | ==Introduction== | ||
[[Image:Cataract donkey.jpg|right|thumb|250px|<small><center>Complete visual impairment from advanced cataract | [[Image:Cataract donkey.jpg|right|thumb|250px|<small><center>Complete visual impairment from advanced cataract | ||
| − | with continual | + | with continual mydriasis. (Image courtesy of [http://drupal.thedonkeysanctuary.org.uk The Donkey Sanctuary])</center></small>]] |
A high proportion of [http://drupal.thedonkeysanctuary.org.uk The Donkey Sanctuary’s] herd is elderly and so acquired, diffuse cataracts are very common. These are easily diagnosed. | A high proportion of [http://drupal.thedonkeysanctuary.org.uk The Donkey Sanctuary’s] herd is elderly and so acquired, diffuse cataracts are very common. These are easily diagnosed. | ||
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==Treatment== | ==Treatment== | ||
| − | '''Surgery | + | '''Surgery''' to remove the lens is useful in cases of''' congenital cataracts'''. The optimal age for surgery is during the first few months. If [[Uveitis - Donkey|recurrent uveitis]] has occurred then the success rates are lower. |
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| + | ==Literature Search== | ||
| + | [[File:CABI logo.jpg|left|90px]] | ||
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| + | Use these links to find recent scientific publications via CAB Abstracts (log in required unless accessing from a subscribing organisation). | ||
| + | <br><br><br> | ||
| + | [http://www.cabdirect.org/search.html?q=title%3A%28cataract%29+AND+od%3A%28donkeys%29+ Cataracts in donkeys publications] | ||
| + | |||
| + | [http://www.cabdirect.org/search.html?q=title%3A%28cataract%29+AND+od%3A%28horses%29+ Cataracts in horses publications] | ||
==References== | ==References== | ||
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|linkpage =Lens Diseases - Donkey | |linkpage =Lens Diseases - Donkey | ||
|linktext =Lens Diseases - Donkey | |linktext =Lens Diseases - Donkey | ||
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|pagetype=Donkey | |pagetype=Donkey | ||
}} | }} | ||
| + | {{infotable | ||
| + | |Maintitle = [[Sponsors#The Donkey Sanctuary|This section was sponsored and content provided by '''THE DONKEY SANCTUARY''']] | ||
| + | |Maintitlebackcolour = B4CDCD | ||
| + | }} | ||
| + | [[Category:Donkey]] | ||
| + | [[Category:Lens Diseases - Donkey ]] | ||
Latest revision as of 11:26, 21 October 2010
Introduction
A high proportion of The Donkey Sanctuary’s herd is elderly and so acquired, diffuse cataracts are very common. These are easily diagnosed.
Clinical Signs
- The lens is obviously opaque and the pupil fully dilated in severe cases
- There is reduced vision, especially in dim light
- Lack of a pupillary light response (PLR) indicates an advanced condition
- They can be unilateral or bilateral
Diagnosis
Pupillary dilation should be achieved prior to ophthalmoscopy to check the extent of the cataract, to rule out lens luxation and to check the fundus for recurrent uveitis, which will eventually cause cataracts. As most cases are secondary to recurrent uveitis, posterior synechiae develop due to the inflammatory response.
Nuclear sclerosis can be mistaken for cataracts. This is a normal ageing response as the lens hardens and takes on a ‘pearl-like’ appearance. However, the fundus is still visible through this.
Treatment
Surgery to remove the lens is useful in cases of congenital cataracts. The optimal age for surgery is during the first few months. If recurrent uveitis has occurred then the success rates are lower.
Literature Search
Use these links to find recent scientific publications via CAB Abstracts (log in required unless accessing from a subscribing organisation).
Cataracts in donkeys publications
Cataracts in horses publications
References
- Grove, V. (2008) Conditions of the eye In Svendsen, E.D., Duncan, J. and Hadrill, D. (2008) The Professional Handbook of the Donkey, 4th edition, Whittet Books, Chapter 11
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This section was sponsored and content provided by THE DONKEY SANCTUARY |
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