>> Adjusting sensitivity of the optical sensors (the sensors itself, not 
>> just the iris). 
> 
> Isn't that what dark adaptation is? Essentially your brain increases the 
> amount of gain when there are low levels of light.

The human eye features two systems for adapting to light levels. One is 
the iris, which can adjust the amount of light that enters the eye. But 
in really low-light conditions, a second set of light receptors in the 
retina which respond to much lower light levels. (And don't distinguish 
colour. That's why in the dark, everything seens monochrome.)

>> Manual focus possibility (both full and basic settings) for the
>> optical sensors. 
> 
> You can't do this? I've always been able to adjust the focal point of my 
> eyes on command.

Likewise. I can also adjust the convergence...

-- 
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