What causes a dog's eye shine and how can it be managed or treated?

A dog's eye shine is caused by the tapetum lucidum, a reflective layer behind the retina that helps improve night vision. It can be managed by keeping the eyes clean and healthy through regular grooming and veterinary check-ups. If there are any issues with the eyes, such as redness, discharge, or cloudiness, it is important to seek veterinary care for proper diagnosis and treatment.