This book contains some path-breaking studies in the field of ophthalmology. Ocular system is the most important part of the eye. It refers to the central visual system of the eye. It is through this system that things are visible to all animals, including humans. It is the process through which the image is formed on the retina and then is perceived by our brain. The various studies and researches that are constantly contributing towards the discovery of advanced knowledge about this field are examined in detail in the text. It is appropriate for students seeking detailed information in this area as well as for experts.