Book excerpt: Seeing is life. Seeing is transfonning luminous col We wish to extend our academic and theoretical ored stimulations and shapes into amental represen knowledge and also to complete and exchange our tation, structured in space and in time. But seeing is technical and professional experience to prepare also opening onto the world that surrounds us: it is corrective means for the future. thus a means for communicating and learning. Numerous questions have yet to be answered, Jean-Jacques Rousseau, a philosopher worth such as: quoting during the bicentennial of the French Revo lution of which he was an instigator, stated, "of all • Will it one day be possible to defer or stop the the senses, vision is that wh ich can be the least aging of the accommodative apparatus? readily separated from judgments of the mind. " • Is further improvement of the current corrective Sight is increasingly called on in our modern means possible, whether spectacles or contact world. Maturity is affected at about 40-45 years by lenses? the on set of presbyopia. Atthat age, which demands • How are behavioral and psychological presbyope all our intellectual and physical means, our sight typologies to be integrated in the course of exam should be irreproachable. Our efficiency must not be ination, prescription, and fitting with corrective diminished.