| 摘要 |
<p>The invention relates to trial spectacles for correcting glasses, permitting the optician to test on his client the visual correction contemplated, prior to the final equipment, and more particularly in the case where multifocal glasses are intended. The systems known at the present time are inadequate and incomplete, and comply with the requirements of only 10% of cases. According to the invention, the frame comprises at least two frame elements permitting the mounting of the calibrated round glasses (2) in front of each eye, a transverse slit (3) being formed in the thickness of the frame, at the location of each eye, to permit against the springs (4) the partial and limited spacing, and then the tightening, of the ends of the branches of the frame, at least one longitudinal slit (5) being formed in the thickness of said frame, between the frame elements, commencing at the location of the transverse slit (3) and extending partially along the frame. <IMAGE></p> |
