~She is a weanling.
~She does not have cataracts.

~This picture is not good but maybe you will know how to make it bigger to see her eye.
~The white oval thing only comes on her eye at late night and early morning. When we let her out in her pasture, the white oval goes away.
~We were thinking it was moon blindness but it is not inflamed and it goes away and comes back quickly.
~We called the vet last week but she did not call us back. Maybe someone here knows.

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Ca not see anything in that pic. l would recommend you call an equine ophthalmologist. Eyes are not something you should ignore - they can turn bad real quick. If there is a university somewhere near you with a veterinary school, that would be the best place to start your search for an ophthalmologist. Good luck.

l can not tell from the picture but you need to call the vet ASAP it could be nothing but it could be a problem. He/she should be able to make a diagnostic and help the poor baby. She is really cute btw

l can not tell but l would be calling that vet back and if she does not answer l would be finding another vet! Search google for vets in your area.