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This is a discussion on eye? within the Horse Colors and Genetics forums, part of the Horse Breeds, Breeding, and Genetics category
  • Apaloosas
  • Which horse breeds have a visible blue sclera

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    10-14-2011, 07:49 AM

So my thoroughbred has two different eyes. One is pitch brown-black and the other is like, white?
Does anyone know what this is :s someone said it was a mark apaloosas have? But he's pure thoroughbred? Only 6 years old.
Heres a photo.

Is it normal? Anyone know what it is? :S his other eye is pitch black and yeh its always a tiny bit red, that's how its always been.
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    10-14-2011, 07:52 AM
Perfectly normal, and no it doesn't mean that he is part appaloosa. What you are seeing is the sclera which is white in that eye and dark in the other.
    10-14-2011, 07:55 AM
So its fine? It doesnt bother him at all? It doesnt seem to, he just looks very odd with two different eyes haha
    10-14-2011, 08:07 AM
Yeah he's fine, any breed of horse can have pronounced white sclera. All it is is a lack of black pigment in that particular area. You might want to keep a casual eye on it to make sure it doesn't change at all but that's my paranoid mind talking.

You think your horse looks odd, you should see mine... Satin has one partly-blue eye. Her eyes are brown except for that blue part.
    10-14-2011, 08:11 AM
It doesn't need any more watching than any other eye. It is the exact same area that is white in the human eye. Horse just tend to have that area dark tinted. It has nothing to do with if there is something wronng with the horse or eye.

Personally, I wouldn't worry about it.
    10-14-2011, 08:15 AM
Wonder why appies are more prone to moon blindness (periodic opthalmia) than any other breed of horse then? It's either something to do with the eye (and white sclera is considered an appy trait), or something to do with the immune system (if my understanding of the condition is correct, it's the immune system attacking the eyes?)

Might not be the case in the USA but it is sure the case here in aussie-land, according to my research. One of the many reasons why, though I absolutely love their spotting, I don't think I'll ever have an appy.
    10-14-2011, 08:38 AM
The sclera has nothing to do with the eyesight issues within appaloosas. That is connected to the spotting genes. The sclera is not.
    10-14-2011, 09:16 AM
Oh ok. So basically I want to avoid anything with spots if I want to reduce the chances of ending up with a horse with PO. Bummer. (there go my dreams of a blanket-spotted eventer lol)
    10-14-2011, 09:51 AM
Faceman or bubba would be better able to explain the connect of LP and PATN with moonblindness.

All I have to say on that is you have take each horse as it comes and not condemn a whole breed because of this.
    10-14-2011, 10:22 AM
Originally Posted by NdAppy    
The sclera has nothing to do with the eyesight issues within appaloosas. That is connected to the spotting genes. The sclera is not.
Yeah, but "everybody knows" if you can see the sclera in a non-Appy, the horse is wild and crazy...
csimkunas6 likes this.

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