Final answer:
True, hormonal changes during pregnancy and menstruation can cause discomfort while wearing contact lenses due to changes in the cornea.
Step-by-step explanation:
The statement 'Some women experience discomfort when wearing contact lenses during pregnancy or menstrual periods' is True. Hormonal changes during pregnancy and menstrual cycles can lead to fluctuations in body fluids, which can affect the shape and thickness of the cornea. This can cause contact lenses to fit differently, potentially leading to discomfort or reduced effectiveness of the lenses. While not all women will experience this discomfort, it is a possibility that should be considered if one undergoes changes in vision or comfort while wearing contact lenses during these times.