Abstract: A body tissue observation lens includes a lens base having an integral polarizing filter. The body tissue observation lens has a 40% or higher average transmittance in a visible light wavelength range of 380 to 780 nm. The body tissue observation lens contains a specific wavelength light absorbing pigment such that the ratio of the minimum transmittance in a wavelength range of 580 to 600 nm to the average transmittance in the visible light wavelength range of 380 to 780 nm is 18 to 50%.

Abstract: The present invention provides a non-corrective spectacle lens which is a molded plastic lens used by a person having normal eyesight, or a polarizing lens constituted by the molded plastic lens and a polarizing film integrally superposed on the molded plastic lens. In order to moderately reduce the movement of the muscle necessary for focus adjustment, the non-corrective spectacle lens has a spherical power S within the range of ?1.0 D?S<?0.1 D, where D is diopter as a unit of the spherical power S.

Abstract: A body tissue observing lens includes a lens base having an integral polarizing filter, and having a 40% or higher average transmittance in a visible light wavelength range of 380 to 780 nm. The lens contains a specific wavelength light absorbing pigment such that the ratio of the minimum transmittance in a wavelength range of 580 to 600 nm to the above-mentioned average transmittance is 18 to 50%.

Abstract: The present invention provides a non-corrective spectacle lens which is a molded plastic lens used by a person having normal eyesight, or a polarizing lens constituted by the molded plastic lens and a polarizing film integrally superposed on the molded plastic lens. In order to moderately reduce the movement of the muscle necessary for focus adjustment, the non-corrective spectacle lens has a spherical power S within the range of ?1.0 D?S<?0.1 D, where D is diopter as a unit of the spherical power S.

Abstract: In the temple connection structure of an eyeglass frame according to the present invention, clamp portions for spherical shafts are provided on both sides of the front frame. The ends of the temples are rotataby connected to central shafts of the spherical shafts through joint members. The clamp portions hold and fix the spherical shafts so as to be finely adjustable in any desired direction. Thus, the opening of the temples, orientation of the temples in the vertical direction, and twisting of the temples can be optimally adjustable according to the shapes and sizes of the face, nose and ears of the user.