VetInfo states that Visine eye drops should not be used in a dog’s eye. Visine is not FDA-approved for veterinary use, its effects on dogs are undetermined. Visine is intended to constrict blood vessels to reduce dryness and redness, but it may cause damage to a dog's eye.
According to VetInfo, it is recommended that any dog with symptoms of red and dry eyes lasting for more than two days be taken to a veterinarian. A veterinarian can pinpoint the cause of the eye problems and provide treatment; the dog may be given medicines specifically made for animals or have the foreign body irritant removed. Instead of Visine, VetInfo recommends washing a dog’s eyes once a week with a saline eye wash and eyedropper to maintain moisture.