An object of the present invention is provide a means capable of enlarging the measurable concentration range of a specific component in a solution to be detected, and further measuring a precise solution concentration with ease even when there occur inhibitors such as contamination of a sample cell, turbidity of the solution to be detected, and suspending particles. At least one non-magnetic coupling layer is provided above the non-magnetic undercoat layer, a first magnetic layer is provided beneath the non-magnetic coupling layer and a second magnetic layer is provided atop the non-magnetic coupling layer, and the first magnetic layer is formed of a CoRu-based alloy, a CoRe-based alloy, a CoIr-based alloy, or a CoOs-based alloy. Electrically insulative material is received within the bulk semiconductive material. When the device is in place the scleral spur is moved posteriorly resulting in traction on the trabecular meshwork, which causes a reduction in intraocular pressure for the treatment of patients with ocular hypertension and glaucoma. A transparent panel including a panel having a thickness and a plurality of microholes formed at a side of the panel, a diameter of each of the microholes being 50 to 500 \u03bcm.