how can someone really know the gradual evolutionary proces from bottom-up? - redpilltwice
The very genes - in fact the very letters of DNA - that trigger the building of an eye and all of the individual processes are described in astonishing detail on the scientific press
Every possible stage of complexity from a simple patch of light-sensitive cells all the way to our own complex eyes can be observed in the living world. How colour arose - and was lost - and was developed again is known, how the lens evolved from existing proteins is old news, how the eye came to focus light on the retina is understood.
What exactly do you think still needs to be done before you give your assent?
How much work have you done to research the current state of knowledge?