I am so sorry your pet has dry eye. Below I have pasted a portion of an article from the Shih Tzu club of America explaining dry eye and treatments. You will possibly have to treat this dog for the rest of its life. Dry eye is a very painful condition if its not treated EVERYDAY. Your dog can lose its vision.

The normal tears of a dog consist of the aqueous (watery) portion secreted by the lacrimal glands, and the lipid (oily) portion secreted by the meibormian glands. When properly mixed, the tears form a thin coating, or film, that covers all of the exposed portion of the eyeball. When this film becomes insufficient to keep the eye moist, the cornea dries out. The eye then becomes uncomfortable and will eventually develop corneal damage, scarring, and finally blindness. The lipid portion of the tears continues to be secreted and forms a thick, pus-like substance which can "glue" the eyelids closed. In humans, dry eye is treated with artificial tears, applied in drop form whenever the patient feels the eye becoming dry, normally every hour or so. For most dogs, however, this type of schedule is impractical, unless the animal's caregiver is with the patient all during the day. In all other cases, the cornerstone of treatment for dry eye is a drug called cyclosporine, originally marketed as an anti-cancer agent. When it is diluted in oil and applied to the surface of the eye, it frequently stimulates the existing gland(s) to produce tears again.

Cyclosporine does not work for all patients with Dry eye (KSC), but when it does, it is a real miracle cure. Many dogs are then able to maintain vision for years with a single or twice daily application of cyclosporine. Other medications may also be prescribed, such as antibiotics, corticosteroids, or artificial tears to combat concurrent ocular conditions.

There have been some reports of adverse side effects to treatment with cyclosporine (many only after years of successful therapy) so if your dog is being treated with this agent and seems to develop health problems, contact your regular veterinarian as soon as possible. There are a few patients which simply cannot tolerate the prescription in any dosage.

I feed different dogs different things. As a supplement aI give fish oil. I give them one capsule a day. I give it with a treat and they just swallow it. They get dry food, Grain free. I do chose to give the dogs a small mix in. Every night is different in our home. I buy chicken breast or use old hens we have had dispatched to make a thick chicken soup (little broth left), most nights they get egg. some nights grain free canned food.  Sometimes I give them Ricotta cheese or plain yogurt. Some people believe having mix ins will stain their faces. It does not. All of my dogs have white faces with little to no care at all. They have dirty sloppy faces after they eat but it dries up and faces return to white again.  

I can't find anything under your Grooming

category that might help tame the hair over the nose while it grows

out. I've tried the short-hedge look on the bridge and don't care for

it nor do I think it helps keep his eyes cleaner.

Now that the hair is growing out it is easier to get behind and clean

but more difficult for him to see as it stands up just under each

eye. Since the area is so close to his eyes I don't want to apply a

product that will bother him. I am hoping you might have a product

tip or some advice about this/growing out hair in the bridge/

moustache region that will help us.