"AR Eye" is a free AR (Augmented Reality) app supervised by a doctor that can simulate how you will see before and after cataract surgery. By displaying virtual visual information superimposed on real scenery through a smartphone camera, users can experience how cataracts look before and after surgery in real life, which has been difficult to express with two-dimensional simulation images. It will look like this. Cataract is a disease in which the crystalline lens, which acts as a lens in the eye, becomes cloudy and cloudy due to aging and other factors, making it difficult to see. In cataract surgery, the cloudy crystalline lens is removed by suction and an artificial intraocular lens is inserted to replace it. It is expected that visual function will improve after surgery, but since vision differs depending on the type of intraocular lens, some patients who actually have an intraocular lens inserted may have different vision than expected and after surgery. Some people feel that there is a gap. This app supports the selection of an intraocular lens that suits the patient's lifestyle by providing a simulated experience of how the patient will see before surgery in their daily environment. In addition, since it is possible to check the visual appearance when cataracts develop, it is hoped that the families of cataract patients will be able to experience the inconvenience that patients feel and deepen their understanding of cataracts. The simulation results of this app may differ depending on the camera performance of your device. Also, although we strive to be compatible with as many devices as possible, some models may not be compatible. Thank you for your understanding in advance.