A medical class is hearing a lecture on vision. The doctor asks them what happens when the eye produces too much fluid, causing an increase of pressure within the eye. What condition is the doctor discussing

The doctor is discussing an Ocular Hypertension disease.

Explanation:

If we have a small space with a defined volume like in this case an eye, when we fill this space with a liquid, the liquid will occupy the whole volume available, and when it is much liquid or fluid, and the volume of the eye can not expand it will start to generate an internal pressure. This higher pressure is called Hypertension.