Re: Just joined, so glad to have and need support
Hello and welcome to the forum.
My dog has had vision loss. However, it is not from the pituitary tumor growing, it is from High Blood Pressure which often goes along with cushings. The high blood pressure causes retinal bleeds, which then scar over and eyesight is lost. The only way I was able to have this determined was by seeing a dog ophthalmologist and then having blood pressure checks regularly to get it under control. She has significant focal point loss of sight at this point, but it hasn't gotten any worse so far, as long as we can keep the BP under control.
This all happened very fast, within 3 months, she went from perfect vision to significant loss.
I don't think I would necessarily pursue the CAT scan for the pituitary tumor growth, until you have ruled out blood pressure and cataracts, etc as possible culprits. It is a whole lot easier and cheaper to have the BP checked. They need to take it several times over a course of several hours and then do a sort of curve to determine the average.
Sharlene and the late great diva - Molly muffin (always missed and never forgotten)