Patterns as stripes, for example?

if You are interested in mechanisms related to vision, than Carleton's article could be of some use...

Thank you very much Zsolt... i hope those are exactly what i need... i will let you now as soon as possible... once again thank you again

The question is not clear, but leaders in this field include Justin Marshall at UQ and John Endler.

Here's my contribution. cheers

Here's another. This could really help.

Thank you very much Azubuike,

I just saw your answers!!!!

Hope it helps....

thanks a lot breno, I just saw your answer, :)