The right eye sees darker than the left eye, and this could be a manifestation of fundus disease. Especially the manifestation of optic neuropathy, such as optic neuritis, ischemic optic neuropathy, these diseases may lead to the occurrence of this situation, of course, macular lesions, such as macular edema, macular anterior membrane may also lead to the occurrence of this symptom. Therefore, if you have these symptoms, you should go to the hospital as soon as possible to complete the relevant examinations, including visual acuity examination, optometry examination, intraocular pressure examination, fundus examination, fundus angiography, optical coherence tomography, visual field examination, and after completing these examinations, you will be able to make an accurate judgment of this symptom. If it is optic nerve disease, anti-inflammatory and symptomatic treatment should be given; if it is macular lesion such as macular pre-macular membrane, surgery may be needed. Therefore, we can only know how to treat the disease when we have a clear understanding of the specific condition.