How does evolution explain animals losing vision?

The evolution of eyes and visually guided behaviour - Journals

Whereas non-visual photoreception in animals may use either cryptochromes or opsins, vision is exclusively based on opsin photopigments. Animal ...

Evolution: Poor eyesight reveals a new vision gene - eLife

This led to the identification of 29 genes, 15 of which had not been linked to eye development or function before. However, poor vision is ...

Certain Blind Crustaceans Said to Show Evolution in Action

Blindness in cave-dwelling animals is often touted as a classic example of evolution,1 even though there is no gain of either function or information.2 ...

To See or Not to See: Evolution of Eye Degeneration in Mexican ...

The evolutionary mechanisms responsible for the loss of eyes in cave animals are still unresolved. Hypotheses invoking natural selection or neutral mutation ...

The Evolution of Vision - Professor William Ayliffe - YouTube

Did the eye evolve and, if so, how? Creationists and evolutionary biologists have argued over this controversy since Darwin published On the ...

Blindness – Evolutionary regression? Maybe not! - Biology Online

Humans evolved eyes that enabled sight or vision. About 500 ... 4 How does evolution explain animals losing vision? (2015, March 18) ...

The eyes of mammals reveal a dark past - Nature

By studying the eyes and genes of modern animals, as well as peeking into the fossil record, scientists have begun to piece together how long ...

Evolution: Why do your eyes face forwards? - BBC

Animals with sideways-facing eyes may not have this well-developed depth perception, but they are able to see an extremely wide panorama instead ...

The Evolution of Vision - Gresham College

Did the eye evolve and, if so, how? Creationists and evolutionary biologists have argued over this controversy since Darwin published On the Origin of ...

What blind beetles can teach us about evolution

An adaptive explanation was offered by Darwin himself: “As it is difficult to imagine that eyes, though useless, could be in any way injurious ...

Debunking the myth that evolution can't explain eyeballs

We can watch this evolution work in the other direction, too -- in real time. A recent study found that cave-dwelling species that have lost the ...

Library: Evolution of the Eye - PBS

Because blood vessels run across the surface of the retina instead of beneath it, it's easy for the vessels to proliferate or leak and impair vision. So, the ...

Inside the Eye: Nature's Most Exquisite Creation - National Geographic

A few years ago he enshrined this concept in a model that charts eye evolution in four stages, each defined not by physical structures but by ...

The evolution of vision - Gehring - Wiley Interdisciplinary Reviews

Such a prototypic eye would enable its carrier to determine the direction of the incoming light and provide a substantial selective advantage ...

Misconceptions about evolution

Because evolution is slow, humans cannot influence it. Genetic drift only occurs in small populations. Humans are not currently evolving. Species are distinct ...

Did eyes evolve by Darwinian mechanisms

rare accident giving one lucky animal a mutation that improves its vision over that of its siblings; if this improvement helps it to have more offspring than ...

What is the evolutionary reason for people having bad vision? - Quora

The loss of a function is simply the sign that there is no longer enough selective pressure to maintain it. If people with bad eyesight give ...

Evolution of the Eye | Scientific American

Compound eyes are very effective for small animals in offering a wide-angle view and moderate spatial resolution in a small volume. In the ...

The Role of Gene Loss in Animal Evolution from an Ancestral ...

As explained by François Jacob (1982), “It is ... Cave fish lose their eyes because the energetic cost of vision is high; vision consumes more energy in the dark.

Evolution - Wikipedia

Evolution is the change in the heritable characteristics of biological populations over successive generations. It occurs when evolutionary processes such ...