This chapter serves as an extensive visual reference on the myriad of infectious agents that afflict the eyelid margin, conjunctiva, cornea, and sclera. The atlas details with clarity the manifestations of staphylococcal blepharitis, depicting the classic lid margin changes. It continues with vivid imagery of fungal and parasitic infections affecting the eyelid margin and the variable presentations of bacterial conjunctivitis across different age groups. Images of bacterial keratitis spotlight the diverse corneal responses to bacterial invasion, while the photodocumentation of fungal keratitis captures the distinct morphological patterns of filamentous fungi and yeasts. The chapter also delves into the cornea involvement from Pythium keratitis, Acanthamoeba keratitis, and atypical mycobacterial kerattis. The concluding section on microbial scleritis provides a photographic guide to differentiate it from noninfectious etiologies. This atlas chapter is an indispensable resource, enabling clinicians to visually diagnose and manage the wide spectrum of infectious conditions affecting the ocular surface.