http://www.channelcincinnati.com/fam...43/detail.html
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Putting a dog through a makeshift maze is just one of the ways Dugan can test a dog's eyesight.

There's also a series of tests, a lot like humans go through, that can help determine the health of a dog's eyes. Dugan sees hundreds of pets a year who have either had an eye injury or are losing their vision.

A 9-year-old springer spaniel named Riley is having cataract surgery and getting an artificial lens implanted in one eye. It costs more than $2,000, but since Riley has many good years ahead of him his owners and doctor feel it's worth it.
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But in the case where a dog or cat is not a good candidate for an artificial implant, there's something called Doggles. Doggles are prescription eyeglasses for dogs
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The Doggles company also makes sunglasses for dogs and cats. They come in a variety of colors and sizes. The sunglasses run $10 to $25. The prescription eyeglasses start at $75.