I have read many reports from Dat owners who are concerned about cloudy or bluish eyes on their fish. I can tell you that if the fish is absolutely perpendicular to you, the pupils will appear black. If the fish is on an angle to you and depending upon the angle of illumination through the lens of the eye, the eyes will always appear somewhat cloudy and bluish. Sometimes the level of cloudiness and bluishness is slight and sometimes it appears more substantial. This is completely normal. It is difficult to tell from your pictures, but given this, I wouldn't necessarilly be concerned. Examine your fish in a completely perpendicular orientation. If the pupils appear black (more or less), then it's probably ok.