Final answer:
A nurse should assess the client's liver function by examining the liver enzymes and ordering additional tests if yellow-tinged sclera is observed in a client with dark skin.
Step-by-step explanation:
When a nurse observes yellow-tinged sclera in a client with dark skin, it can be indicative of liver disease or liver cancer. This is because these conditions can cause the accumulation of bile and the yellow pigment bilirubin, resulting in jaundice. Therefore, the nurse should assess the client's liver function by examining the client's liver enzymes and ordering additional tests if necessary.