My sweet 14 yo 11lb dachshund (size small) had a cataract but loved riding in the car with the top down. I worried about glare due to the cataract but took a long time deciding to order these goggles. They were great and he adapted quickly. Unfortunately, he passed about a month after we received the googles. He could have had a better experience for the 6 months I wavered on the purchase. So don't put it off, they a high quality and you won't regret it!