Well, yes, psoriasis can just affect eyes. First, you should know that psoriasis is more than just a skin disease, and we can say that it can be serious in some degree. And according to some researches, it can cause joint damage, known as psoriatic arthritis, and it can also affect your eyes. In some cases, it can lead to serious eye problems, ending up with vision loss. Also, flare-ups near the eyes may occur, and that can be especially painful and hard to treat. By the way, scales and dryness may cause the edges of the eyelids to curve up or down, which may produce drying of the cornea or allow the eyelashes to scrape the cornea of the eye. Anyway, it can be dangerous.