Doggy Specs??

My dogs nose is getting bigger by the day. We now think she has quite a bit of English Bull terrier in her (shame..) I was looking at her a couple of days back and I am convinced that a pair of nice doggy spectacles would suit her. She squints a lot too... Just a random thought.. Does any1 know if you can get a doggies eyes tested.. and if so does anyone know of a retailer for CK specs for her?! xx