Nowadays, when eyes are used intensively and protractedly, often in inadequate lighting conditions, suffering from some visual defect or transient eye irritation and fatigue is quite common at any age. Getting regular eye examinations is a must, but it is usually nothing serious. When, on the other hand, the decline in visual capacity is sudden and substantial, resulting in temporary partial or total blindness in one or (more rarely) both eyes, immediate referral to a medical professional or emergency room for a thorough evaluation of the situation and the causes that may have led to it. In fact, in these cases, there may be a vascular or neurological pathology at the origin that needs to be treated quickly. Some information on this .
