Ch. 57 focuses on ophthalmic drugs, providing a detailed overview of various medications used to treat eye conditions. It begins by outlining the anatomy and physiology of the eye, then explores the pathophysiology of glaucoma, including angle-closure and open-angle types. The text then presents several classes of ophthalmic drugs, such as antiglaucoma medications, antimicrobials, anti-inflammatories, and diagnostic agents, describing their mechanisms of action, indications, contraindications, adverse effects, and interactions. Finally, it includes a nursing process section, offering guidance on patient assessment, planning, implementation, and evaluation related to the administration of these drugs.