Iris defect

RE: Iris defect

Thomas Johnson — Sat, 01 Aug 2015 16:17:46 GMT

[quote user="Robert Lowe"]

Iris coloboma is most likely looking at the edges of the deficit. Atrophy tends to be more diffuse and with less defined edges.

Not likely to have any other consequences for the eye.

[/quote]

Thank you, I've spoken to the client and we'll leave well alone unless anything changes.

RE: Iris defect

Robert Lowe — Sat, 25 Jul 2015 20:34:18 GMT

Iris coloboma is most likely looking at the edges of the deficit. Atrophy tends to be more diffuse and with less defined edges.

Not likely to have any other consequences for the eye.

Rob

RE: Iris defect

Thomas Johnson — Thu, 23 Jul 2015 08:27:52 GMT

[quote user="Stephen Courtney"]

Would be worth checking with the VS who originally saw the eye, but to be honest I'd be much more worried about the liver enzymes - must be significant at that level. Cushings? I'd start with a urine sample then try get a scan done.

[/quote]

The vet who saw it last month is off this week, I'm planning to ask her when she's back next week. The owner is frustratingly reluctant to let us investigate the raised liver values, I suspect because the dog is showing no clinical signs of liver disease or Cushings. I will keep trying to persuade her though!

RE: Iris defect

grumpyoldman — Wed, 22 Jul 2015 22:43:59 GMT

I would just check the IOP with the other side and possibly ultrasound the globe , the damage appears to extend down to the limbus ,so check the zonule remains intact ,that kind of defect combined with lens movement in an anterior direction could cause angle closure glaucoma or predispose to anterior lens luxation so well worth monitoring the relative depth of the anterior chamber ...........and the ALKP sounds cushingoid.

RE: Iris defect

Stephen Courtney — Wed, 22 Jul 2015 22:07:09 GMT

A coloboma is a congenital lesion - so not caused by atrophy. The term refers to a missing chunk of tissue which never developed. I think this must be iris atrophy and probably was there more than a month ago - just realised if you click on the image you can enlarge it!

RE: Iris defect

Vikki Halliday LLB — Wed, 22 Jul 2015 19:15:04 GMT

It's a nice coloboma, possibly iris atrophy as well. Here is last week's pic from a 12 yr old mini dachshund

RE: Iris defect

Thomas Johnson — Wed, 22 Jul 2015 18:04:28 GMT

[quote user="Stephen Courtney"]

It looks like the iris is damaged - seems too localised and severe for atrophy but it could be. Was it normal a month ago when you first saw the dog?If it was then I'd be concerned that there may be a more aggressive lesion underlying this e.g. tumour but it is hard to see in the photograph. There does seem to be something dark at the lateral edge of the defect that might be sinister.

I find almost every older small white dog seems to have raised liver enzymes...drives me nuts

[/quote]

I think what you can see on the lateral edge is an artefact in the photograph. Other than the hole I couldn't seen any abnormalities when I examined the iris with an ophthalmoscope. Unfortunately I didn't see the dog last month so can't be certain the defect wasn't there a month ago.

Her ALKP was 2493.6!

RE: Iris defect

Stephen Courtney — Wed, 22 Jul 2015 17:44:55 GMT

I find almost every older small white dog seems to have raised liver enzymes...drives me nuts

RE: Iris defect

Utlendigur — Wed, 22 Jul 2015 15:16:24 GMT

Iris atrophy? Seen something similar in a miniature poodle