In the thirteenth and fourteenth centuries, the image of Christ healing the blind man began to appear alongside psalmic text in western European psalters and books of hours. In this thesis, I elucidate the devotional implications of the miracle of the blind man, foregrounding illuminated examples—located in the Rutland Psalter, Saint Elizabeth Psalter, Taymouth Hours, and Psalter-Hours of Yolande de Soissons—within the context of period discourse concerning the corporeal and spiritual nature of the eye. My discussion first considers how lay viewers perceived the miraculous restoration of sight as a reflection of the process of divine illumination and contemplative ascent. I then elaborate upon the relationship between blindness, the sacrament of Baptism, and medieval Passion Plays, demonstrating how the blind man’s place within the overall decorative program of each manuscript underlines the soteriological significance of this miracle and its role as a necessary precursor to the Resurrection.