The darkness of the eyes may be caused by ageing, macular degeneration, cataract and other reasons. 1. Ageing: With the gradual increase of age, the muscle and nerve function of the eyes gradually decreases, and the symptom that the eyes always feel especially dark can occur at this time, which is a common physiological phenomenon, and there is no special treatment method. 2. Macular degeneration: when trauma or bacterial infection occurs, it will cause damage to the nerves and tissues of the eyes, easily inducing macular degeneration, which will also affect the central vision and make the patient’s eyes always feel particularly dark when looking at things. 3. Cataract: Under the influence of genetic trauma and drugs and other factors, it can lead to cloudy lens and cause cataract. After suffering from this disease will lead to the decrease in the ability of the eyes to sense light, appearing eyes always feel especially dark performance. It may also be caused by other reasons, such as overuse of the eyes, vitreous abnormality, etc. You should go to the hospital in time to clarify the cause of the disease and choose the appropriate method of treatment.