The cataract in a dream is interpreted as the symbol of ability to see things clearly. Perhaps the dream warns you of the things that you were unable to see.
Dream dictionary: Cataract dream meanings
(Waterfall) To discover oneself having cataract in a dream means suffering from sorrow, sadness and dismay.
…In a dream, vapor represents a symptom of cataract that makes one’s eye cloudy and obscures his sight. If during the summer one sees vapor exhaling from his mouth in a dream, which is a common phenomena in cold weather, it means an internal disease, or exposing one’s secrets. If the person in question in such a dream is a believer on the path, he may become heedless. If he is a man of knowledge, he may invent a provoking trend. On the other hand, vapor in a dream may imply falsehood, lies and idle talk, (Also see Clouds)…
…(Disease | Ophthalmia) In a dream, eye inflammation means tightening of one’s earnings, or it could mean heedlessness. Seeing one’s eyes inflamed in a dream means that one’s father or mother may fall sick. Inflam- mation of the eyes in a dream also denotes near blindness or suffering from a cataract. Any vision loss in a dream represents failing to properly perform one’s religion, loss in business or an indication of the state of one’s children….
…As everyone has heard of this great cataract, and multitudes have seen it, it is not strange that a good many people dream of going there: such a dream is a sign that you will be embarrassed in company by a sensation of some kind. Lucky lottery dream numbers – 13, 49, 6,…
(See Cataract)
…also represents victory in one’s life, or it could mean guidance, blessings and observing God’s laws. The sunset Maghrib prayers in a dream means losing a parent, the passing away of one’s guardian, the death of a close friend or the impeachment of the person the dream indicate. Seeing oneself praying the night ‘Isha prayers in a dream means preparing for a journey, or it could mean marriage, moving from one place into another, or it could mean suffering from cataract, weakness of one’s vision, or it could denote the vastness of what is to come, for ‘Isha prayers are distant from the dawn Fajr prayers. Performing the dawn Fajr prayers in a dream indicates a vow one pledges. Praying the mid- afternoon ‘Asr prayers in a dream means attaining ease after suffering from hardships. Performing the sunset Maghrib prayers in a dream means having crossed something that will come…