The yellowing of the eyes after waking up may be caused by normal physiological phenomena, visual fatigue, retinopathy, etc. If it lasts for a long time, you should consult a doctor in time to clarify the cause of the disease and then treat it. 1. Normal physiological phenomenon: just woke up yellow eyes, if only temporary, generally do not have to worry too much, may be a normal physiological phenomenon, and the fundus photoreceptor cell function activation, conversion and so on. One of the cone cells mainly feel the bright light, color, different individuals to light, color and other sensory, the time required to adapt may vary. 2. Visual fatigue: If you wake up with yellow eyes after staring at electronic devices for a long time or staying up late for a long time, you should consider visual fatigue, and such people will also have dry eyes, foreign body sensation, blurred vision and other symptoms, so you should pay attention to the regularity of work and rest to ensure adequate sleep and reasonable use of the eyes. 3. retinopathy: retinopathy is caused by obstruction of small arteries near the retina, arteriovenous short circuits, etc., which affects normal color vision and causes yellowing of the eyes when you wake up from sleep, and you need to seek medical attention to improve the funduscopic examination. Just woke up yellow eyes, if it is only temporary, after rest can be relieved, generally do not worry, if a long time do not see relief, it is recommended to consult a doctor in time for examination.