In this video, Dr. Manisha Agarwal, Vitreo-retina surgeon, Dr. Shroffs Charity Hospital, New Delhi, will talk about what is retina and what are retinal diseases which affect the eye. Retina is the back part of the eye and the main layer of the eye where the image of the object which we see is formed. Through the optic nerve, the image is communicated to brain. This is the process which helps us to see the various images around us. Thus, Dr. Manisha will explain in details about retina and how it is affected by systemic diseases.