Suddenly seeing things far away and small in the eyes may be caused by lack of sleep, visual fatigue, retinopathy and so on. 1. Lack of sleep: with the increase of age, work pressure, constantly staying up late, sleep deprivation, and also lack of exercise, will lead to the patient’s eyes suddenly see things far away and small situation. 2. Visual fatigue: excessive use of computers, cell phones and other ciliary muscle spasms, resulting in a sudden decline in visual acuity, appear to see things very far, very small, unclear situation. 3. Retinopathy: mainly due to retinal artery obstruction, vein obstruction and other retinal vascular circulatory disorders, resulting in the patient’s eyes suddenly see things very far and small, accompanied by vision loss. It is recommended that patients go to the hospital in a timely manner, in accordance with the doctor’s instructions for targeted treatment, life should be normal work and rest, reasonable use of the eyes, to avoid eye stimulation by bright light.