"Dry Eye Checker" is a smartphone app that assists in diagnosing dry eye.* To use it, a prescription from a doctor at a medical institution is required. [Purpose of dry eye checker]Dry eye is one of the most common eye diseases, affecting 20 million people in Japan and more than 1 billion people worldwide. Symptoms such as a feeling of dryness and discomfort in the eyes due to dry eye deteriorate the quality of vision over a long period of life, causing significant economic losses due to decreased concentration and productivity. Therefore, early diagnosis and early treatment are necessary. However, even with dry eye symptoms, there are many people who do not have time to visit a medical institution on a regular basis and who suffer from symptoms without receiving appropriate treatment. "Dry Eye Checker" is an application that can assist in diagnosing dry eye using a smartphone.For those who cannot directly visit a medical institution, we will provide continuous dry eye treatment through telemedicine and online medical treatment.* To use it, a prescription from a doctor at a medical institution is required.