Holiday in Orebro – Orebro Travel for These artificial, external lenses aid the eye in focusing light so that it produces clear images, rather than blurs and blotches. Microscopes and telescopes are also constructed from optical lenses. These magnifying lenses bend light in particular ways, allowing a focused image of very small or very distant objects. Theories help us put the world in focus. What optical lenses do for our vision, theories do for our understanding. Whereas optical lenses improve our sight, theories improve our insight. Theories are conceptual lenses. Holiday in Orebro – Orebro Travel 2016.