Report Vision oddities? in PANS / PANDAS (Lyme included) Posted March 1, 2012 Peg, I take sweetie to a pediatric neuro-opthamologist. They can use lenses to determine fairly accurately what her vision is without her ever having to answer a single question. I think how they do is by shinning a mild light into her eye through the lens and see where that light makes its focal point. They then tweak the lens strength until the focal point is on the retina. No big machines, just a 1.5" lens and a mild/moderate light. At least that is how I understand what they are doing. Sweetie is almost visually blind in one eye and they think it corrected to 20/60 or so with the glasses, but without glasses an object would have to be touching her eye lashes for her to be able to see it clearly. Her other eye is not fantastic, but nothing as bad as the first. Hope that helps some anyway.