Vision is typically seen as the most crucial of the senses, and it is also the one that most people are most afraid of losing. Vision is frequently regarded as the most important sense that allows a person to work and function independently. The eye is a highly specialized organ that can suffer from a wide variety of diseases. Different anatomical parts of the eye may be affected by both local and systemic disease. The complicated physiology of the retina and the anatomy of the eye render the development of effective treatments complex. Because of the eye's unique anatomy and physiology, delivering drugs to the eye has been a huge difficulty. Topical (e.g., eye drops) and systemic (e.g., tablets) formulations are the least invasive ways for ocular drug administration.