Secondly, each of those eye arrangements that was superseded by a better arrangement is very unlikely to have survived for hundreds of millions of years in the face of competition from animals possessing better eyes, and as a result, very few extant species retain eyes with the intermediate features.
We do not live in the same world today as when the Five Eyes arrangement was founded.
Providing for a complex division of roles, responsibilities and lines of authority, and the establishment of jointly run operations centres, the Five Eyes arrangement creates a signals intelligence architecture vaster than Nato.
As just mentioned, it is likely (although still open for debate) that refracting superposition optics and the stalked-eye arrangement both evolved independently multiple times.
Mrs Merkel said she did not know the exact details of the Five Eyes arrangement so could not say whether that is exactly what Germany is seeking, but added: "We need something clear-cut, in line with the spirit of an alliance".
The Internet Party does not immediately advocate exiting the Five Eyes arrangement, but it does have a particular focus on repealing copyright laws that punish geo-blocking evasion, and introducing a "fair use" legal defence, plus strengthening "safe harbour" provisions.
He added: "Sure, our intelligence gathering has got to be done in a way that is decent and fair and which doesn't betray the fundamental values that we are doing our best to uphold, but we should never, ever apologise for doing what's necessary to protect ourselves and to help our friends, and that's exactly what the Five Eyes arrangements are designed to do".
Thus, a 60-year-old would not be able to read a book held at the convenient distance of about 40 centimetres (16 inches), and the extra power required would have to be provided by convex lenses in front of the eye, an arrangement called the presbyopic correction.
Even in a healthy and normally functioning eye, this arrangement causes problems.
Flowers are everywhere: a cluster of amaryllis against one wall, lush bouquets on the tables and an eye-popping arrangement on the bar.
