Final answer:
The nurse's best response would be that dry and gritty eyes in older adults are a normal part of the aging process because the tear glands and conjunctiva do not lubricate the eye as well with aging, leading to reduced tear production and dryness. However, if symptoms become severe or interfere with daily activities, it is important to seek further evaluation and management from a healthcare provider.
Step-by-step explanation:
The nurse's best response to the patient's concern about dry and gritty eyes in older adults is: "This is because the tear glands and conjunctiva don't lubricate the eye as well with aging." As people age, the tear glands produce fewer tears and the conjunctiva, which is the clear membrane that covers the front surface of the eye, becomes thinner and drier. This can lead to dry and gritty eyes. It is a normal part of the aging process. However, if the symptoms become severe or interfere with daily activities, it is important to see a healthcare provider for further evaluation and management.