I Am Awaiting A CT Scan To Find Out Why

I am awaiting a CT scan to find out why I have blurry vision and eyes photo sensitive, as eye Doctor says nothing can be seen to be wrong with the eye and appears it is a problem for a Neurologist. In the meantime my blood tests showed I have a low white blood cell count (which always shows up in my blood tests) and high cholesterol levels - yet I eat ridiculously healthily, and I am an ultra runner and a Personal Trainer. What could be the reason for high cholesterol if I eat veg and fish, I don't eat any other meat, I don't eat potatoes, so no chips, I don't eat eggs ever, not even as an ingredient as I don't like to and I don't eat any dairy products, so never eat cheese etc. There is no history of heart disease in my family and my blood sugars are normal.