The present invention relates to optical instruments, in particular to magnification loupes, such as those worn by dentists and surgeons. The invention features magnification loupes that are equipped with a light source, an energy harvesting component and an energy storage component. The invention further relates to magnification loupes comprising a light source and a polymer battery as energy storage component. In addition, the invention is directed to magnification loupes comprising a first light source emitting a light beam and a sensor structured and configured to detect a reflection of this light beam. If such a reflection is detected, a second light source mounted on the magnification loupe is turned on or off. The invention further concerns a ring made from or coated with a light-reflecting material. The invention also relates to a battery charging station on which the batteries present in the magnification loupes can be recharged.
