A light-guided, ophthalmic-treatment-system for administering therapeutic agents to, into or through the scleral wall of the eye globe using any one of a variety of therapeutic applicators in conjunction with either transcorneal or transpupillary viewing methods or both. A first 32-bit operand is treated as a signed shift value that has a sign and a shift count value. Accordingly, it is possible to guide the FPD sales staff and an FPD management company, and furthermore, each customer can easily avoid problems related to reduction in business efficiency or sales efficiency of the FPD, and the inability to rapidly invest in and possess desired FPD, and the like.