Dark shadows in front of the eyes are mainly caused by various eye diseases, so patients should go to an ophthalmologist. If the patient has refractive interstitial clouding or retinopathy, the light is partially blocked when it is projected into the eye through the pupil, which leads to the symptom of dark shadows in front of the eyes, which can be caused by the cornea, lens, vitreous, retina and other parts of the eye, and it is recommended that the patient go to the ophthalmology department for medical consultation. Commonly, corneal lesions that cause dark shadows in front of the eyes include corneal foreign bodies, corneal stigmata, etc. Lens lesions include senile cataracts, etc., vitreous lesions include vitreous clouding, vitreous degeneration, etc., and retinal diseases include retinal hemorrhage and retinal detachment. Patients with dark shadows in front of the eyes are advised to seek prompt medical attention to evaluate their condition and follow the doctor’s instructions for treatment.