Earlier quoted context omitted.
I'm not sure how much it would cost to hire a translator for an hour or two, but you'd probably still come out ahead.
Is the eye chart in kanji? That’d be tough to translate.
I'm not sure what you'd do about the eye chart. I don't know about optometry but I would imagine you can't just print off a poster of an English-language eye chart and use that, I always figured they'd be calibrated for a certain size, resolution, and the distance from the vision test machine taken into account.
As you suggest, given the number of western tourists to Japan I'm sure there'd be some subset of optometrists who are set up for English-language patients.