Veterinary questions? Ask a Vet for Answers ASAP
Without further information or a photo it is very difficult for me to provide the best advice but I shall certainly try.
Please reply when you can and we can continue the conversation.
Mario's signs could be due to e.g. an eye infection, corneal ulcer, Horners disease (an inflammation of the nerves near the eye), an inner ear infection etc.
A vet visit is best to check him all over, assess his nerve function and closely examine the eye. The vet should stain it for any ulcers and flush for any foreign bodies.
Treatment will depend on what is going on and may include e.g antibiotics and anti inflammatories.