Simply discus is a forum that deals with only discus - if you havent joined, its a good site to go to. Your discus has cloudy eye and is flashing..which means he has an internal parasite as well. Discus rarely get ich..
Signs of Fluke infestation include scratching against objects by the fish, rapid breathing due to loss of use of part of a gill, or even holding a gill shut and not using it. Adult fish can usually tolerate a minor infestation of flukes, but if a fish is stressed or weakened the flukes start to overtake the fish.
Cloudy eye can be caused by injury to the eye, fungus, bacteria, parasites, but most often due to poor water quality. (Dr. Carrington, Maintaining a Healthy Aquarium, 1985 by Salamander Books)
The recommended treatment is clean water, water changes at 50%/day. Salt may be added at 1 to 2 tablespoons/10 gallons aquarium water. PH may be lowered to 6.0, this sometimes helps.
If the eye does not clear or becomes worse, Acriflavine or Methylene blue sometimes helps (Untergasser1989).
For this, clean water and water changes every day is a must, and salt dips work to help clear out parasites. If he gets worse you may need to QT him and dose him with meds. Keep a watch, discus turn really fast from being fine one day and extremely sick the next.
Good luck!