In the pre-operating room, you will be seated on a cot. A nurse arranges for the collection of data and nursing anamnesis (state of health, allergies, and habitual drugs). Afterwards, we proceed to obtain venous access and monitoring of vital signs. The eye is then marked to determine which part is to be subjected to intervention. We then proceed with the instillation of certain drugs for pupil dilation and local anesthesia. 

This phase can vary in time relative from individual to individual as is the time dedicated to the dilatation of the pupil (which requires different times in different patients), the stabilization of blood pressure, the disinfection of the skin, and the installation of antibiotic eye drops (it must be given time to act).

You should not therefore imagine that the timetable for the procedure is rigidly defined, and the entire length of the intervention, including the waiting time before and after the actual operation, can occupy a good part of the day.