This chapter delves into the complex and diverse range of ocular surface diseases (OSD), offering a comprehensive and visually engaging exploration. This chapter meticulously depicts images on dry eye syndrome, highlighting its pathophysiology, clinical manifestations, and treatment modalities. The section on rosacea provides insights into its ocular manifestations, particularly affecting the cornea. Seborrheic and staphylococcal blepharitis images are also highlighted, illustrating their impact on the eyelid margin and potential corneal involvement. The chapter further depicts information on neurotrophic dry eyes, inflammatory dry eyes, and lid wiper epitheliopathy. Marginal keratitis is presented with a focus on its corneal periphery involvement, while phlyctenular keratoconjunctivitis (phlyctenulosis) is explored through its immune-mediated corneal presentations. Finally, the chapter covers hordeola and chalazia, emphasizing their etiology, clinical differentiation, and therapeutic approaches. Enhanced by high-quality images and diagrams, this chapter is an invaluable pictorial resource for understanding the intricate relationship between these OSDs and corneal health.