Answer :
the linear separation d at the retina is 5.73micrometers
diameter=2mm
lambda=500nm
nair=1.33
d=2.5cm
alpha=1.22lambda/nd
=1.22(500x10^9)/(1.33)(2x10^-3)
=2.3x10^-4 rad
D=(2.3x10^-4)(.025)=5.73micrometers
The area of the eye that transforms light into neural signals is called the retina (Latin: rete, "net"). Most vertebrates and some molluscs have this innermost, light-sensitive layer of tissue in their eyes. A two-dimensional representation of the visual world is created on the retina by the optics of the eye (cornea and lens); some of the image is in focus and some of the image is out of focus. Visual perception is produced by the retina's processing of the image and the optic nerve's transmission of nerve impulses to the visual cortex. Similar to a camera's image sensor, the retina fulfills a purpose.
The neural retina is supported by an outer layer and is made up of numerous layers of neurons coupled by synapses.
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