Ophthalmic examinations are relatively numerous depending on the disease, and the routine examinations mainly include visual acuity examination, optometry examination, slit lamp examination, intraocular pressure examination, fundus examination, etc. The cost of these routine examinations is usually not too high, generally within 100 yuan. If, after the above routine examinations, other diseases of the eye are found and need to be further clarified, it may be necessary to resort to retinal fundus angiography, ocular AB maneuver, ocular color Doppler examination, optical coherence tomography examination, corneal topography, corneal endothelioscopy, corneal confocal microscopy, etc. The cost is higher if the above-mentioned examination methods are used.