It is most intense when focused on a single point rather than beamed in parallel rays
Two parallel rays
from the top and bottom of the object are refracted at the front surface of the eye, cross a short distance behind its geometrical centre, at a point referred to by Gaukroger as the focus, and then diverge again to produce an inverted image on the retina.
In this new approach, when the light beam carrying the video/audio/data enters the connector a spherical optical lens converts the light beam into a series of parallel rays
that pass through a mechanical gap.
Previous analyzers could resolve only a very intense X-ray beam, a beam of a single wavelength, or a beam of highly parallel rays
In a flat universe, parallel rays
stay parallel forever on the largest scales.