OCT, or Optical Coherence Tomography, is used to check for intraocular diseases such as glaucoma and age-related macular degeneration. Patients are advised to undergo optical coherence tomography when they experience dry and painful eyes. Optical coherence tomography is commonly used to check for eye diseases such as glaucoma, age-related macular degeneration, diabetic retinopathy, choroidal neovascularization, hypertensive retinopathy, vitreoretinopathy, and so on. When patients have unexplained dry eyes, eye pain, mosquitoes, distorted vision, vision loss and other manifestations, they can promptly seek medical treatment for optical coherence tomography examination. It is recommended that patients go to the ophthalmology department of regular hospitals for consultation, and if eye diseases occur, they should seek medical treatment in time, complete the relevant examinations and follow the doctor’s instructions for treatment.