To provide a program and system for preventing the glaucoma capable of finding the glaucoma early by a simple operation and securely preventing the glaucoma.

In the program and system for preventing the glaucoma, a web server 2 continuously makes motions of lighting an optional point for a short period of time on the visual screen of a user's PC 1 based on the access from the PC 1 on the web. As the user clicks a mouse on the lighting, the recognition or non-recognition of the lighting on the lighting point is recorded, and the recognition or non-recognition is displayed on a display part of the PC 1.