We train our telescopes on small patches of sky for long spells, trying to drink in as much faint light from distant objects as possible. (newscientist.com)
The standard replacement lenses, however, can only focus light from distant objects, unlike the natural lens, which changes shape to focus on different distances. (newscientist.com)
And scientists studying other phenomena, such as optical illusions in space caused by gravitational lensing — a gravity - induced effect that causes light from distant objects to bend and distort around closer objects — will also be useful in making more precise measurements. (newscenter.lbl.gov)