A recent study was published evaluating the link between dry eyes and depression.
This study confirmed that the correlation between dry eye symptoms and depressive symptoms is fairly strong. An odds ratio of 2.79 means that dry eye patients are 2.79 times more likely to report a certain level of depressive symptoms than controls after adjusting for variables such as psychiatric medications. We know that many medications for depression and anxiety can induce or aggravate dry eye symptoms. As clinicians, we were never sure about which came first, dry eye or depression, which required medication therapy that worsened dry eye symptom.
I find this study very interesting and valuable as it shows how the chronic nature of dry eyes can affect one and the importance for recognizing and treating dry eyes as well as the other conditions that may be associated with it.