Well, yes, sunken eyes can be caused by weight loss. As we know that sunken eyes may appear darkened either due to shadowing or purple hues in the skin. It is different from bags under the eyes. And a primary cause of sunken eyes is malnutrition and possibly starvation. So we can also say that when you have starvation, it can lead to weight loss. In many cases, it is a condition or digestive problem that is preventing your body from absorbing food properly. And then it leads to weight loss. And then it can lead to sunken eyes. For the causes of sunken eyes, dehydration is another possible cause. So you can just take some measures to treat it. For example, you can put some cold teabags under your eyes. And also, keeping having a health and good body is also important.