The invention provides multifocal lenses for correction of presbyopia. Moreover, an inter-layer insulating film made of an organic material is provided on thin film transistors of respective picture elements, and a picture element electrode is provided on the inter-layer insulating film. The cylinder and the distribution box are entirely contained in the enclosure defined by the body, with the cylinder being mechanically supported by one of its ends of the body. The source, the drain, and the semiconductor layer are each comprised of a second semiconductor material having an opposite conductivity type from a first semiconductor material comprising the gate. This alloy is a conductor of heat and electricity. The cell therefore has low power consumption during write operations allowing for fast writing and dense integration of cells in an array.