This book is an up-to-date, single-volume, concise reference in ocular oncology. The book is divided into eight chapters. The first chapter is an introduction to oncology in general that covers basic concepts in cell biology, tumorigenesis, the hallmarks of cancer, and tumor pathology. The second chapter discusses the standard treatment methods employed in ocular oncology, including surgical approaches and techniques, treatment with physical energy such as radiotherapy, lasers, and cryotherapy, and the indications and toxicities of systemic and regional drug therapy. The following five chapters demonstrate the examination, classifications, clinical and imaging presentation, and current specific management options of tumors and relevant lesions that involve the eyelid, ocular surface, orbit, uveal tract, and retina. The final chapter highlights the direct and indirect impact of systemic cancers on the ophthalmic tissues and their management. The book has been richly illustrated with over 350 original figures, schematic representations, and comparison tables. Principles of Occular Oncology is a must-have resource for ocular oncology specialists and trainees, general ophthalmologists, and allied cancer care specialists who manage ophthalmic tumors.