Your dog may have glaucoma or Anterior Uveitis or a corneal ulcer or cataracts. Symptoms of Glaucoma include conjucntivits (red eye), discharge from the eye, light sensativity, possible swollen eye. As the condition worsens and pressure increases, the pupil can dilate and the cornea becomes cloudy. It is important to diagnose this early to save the dog’s sight in the eye. Depending upon the underlying cause for the Glaucoma, the other eye could also be at danger as well. Treatment depends upon identifying the underlying cause for the increased pressure in the eye. You can read more about this here;
Symptoms of Anterior Uveitis are similar and include redness, tearing, squinting in bright light, small or uneven pupil, cloudy appearance to the eye and a unevenly colored iris. Treatment for this condition may be topical or oral medication depending on the cause. You can read more about this here:
A corneal ulcer may also be to blame and may be caused by injury, eyelashes scratching the eye and has similar symptoms to those of glaucoma and anterior uveitis. The third eyelid frequently covers the eye so sometimes the eye is not able to be seen. You can read about this here:
You can read up on Cataracts here:
The following site goes over reasons for cloudiness of the eye.
As you have seen, this could be an emergency situation depending on the severity of the condition. However, some cloudiness as a dog ages is normal and called nuclear sclerosis. I would have my dog seen as soon as possible to avoid further damage to the eye.
The itchy skin could be a few different things. First thing is to definitely rule out fleas. If your dog is on advantage or frontline, you can skip this step. If they are not, you should at least explore the possibility of fleas by examining your dog’s skin especially around the rump area under a bright light. Fleas are fast and are a reddish brown color so you have to look closely. Frequently you will only see flea dirt (feces). If you find fleas dirt or what you think is flea dirt, get a moist white paper towel and rub it on the area. If it turns reddish color then it most likely your dog has fleas. A flea comb or lice comb run through the area may capture a live flea as well.
If fleas are ruled out, it may be dry skin. If you believe this may be the cause, I think your best bet would be to supplement your dog's diet with Omega n3 fatty acids. You can do this using fish oil capsules.
Then there might be a skin condition such as staph dermatitis or yeast dermatitis. These skin conditions are generally seen with allergies. Staph usually occurs on the lower regions of your pet and tends to have small pimple type bumps. Shampoo containing Chlorhexiderm and/or Oatmeal can help with this condition. Yeast typically shows as a greasy area that has a sweet musty odor. Sometimes the skin can become inflamed, darker and thickened due to itching. Yeast likes areas such as between toes, armpits and ears. Selsun Blue Shampoo can help with Yeast dermatitis. When shampooing, lather and leave on 15 minutes before rinsing. These shampoos are not meant to be a cure, just a relief until your pet can see a Vet. Benadryl can be given to your dog, the dose is up to 2mg per pound every 8 hours for itching due to allergies.
You can read about allergies here:
Here is a site that goes over itching in dogs.
Hope these suggestions help.