What is a critical instruction for a client after undergoing scleral buckling for a detached retina?

After undergoing scleral buckling for a detached retina, it is important for the client to follow specific post-operative instructions to promote healing and prevent complications. The recommendation to avoid reading for a period, such as one week, is crucial because reading requires focusing the eyes and can lead to eye strain or increased intraocular pressure. This activity might hinder the healing process after surgery and could potentially cause discomfort or complications.

In contrast, the other options either imply a level of activity or positioning that could jeopardize recovery. Resuming normal activities immediately might lead to unnecessary strain on the eyes, while lying flat for an extended period may not be necessary and could be uncomfortable for the patient. Keeping the head elevated at all times is also typically not required and may not align with proper post-operative care. Thus, advising the client to rest their eyes and avoid activities like reading aids in a smoother and more effective recovery process.