Anatomy of the Eye and Vision Process

Ganglion cells receive inputs from photoreceptors located in the retina.

Ganglion cells are responsible for directly detecting light in the retina.

The optic nerve is made up of axons from photoreceptors.

Convergence refers to a small number of inputs being relayed to the next neuron.

The image formed on the retina is always upright.

Amacrine cells inhibit some inputs from photoreceptors before they reach ganglion cells.

Cones in the retina are mainly responsible for night vision.

The Purkinje shift refers to a change in peak color sensitivity from scotopic to photopic vision.

In an On-Centre receptive field, bipolar cells are located on the outside.

Rods and cones in the retina directly connect to the optic nerve.

When light falls on receptors in the central area of an On-Centre receptive field, the ganglion cell will not respond.

Receptive field is the area where a stimulus evokes a response in neurons, but it does not exist in the retina.

If light falls on surrounding receptors, ganglion cells will respond more vigorously.

When the whole receptive field is illuminated, the excitatory and inhibitory responses will balance each other out, resulting in no response from ganglion cells.

Peripheral field stimulation causes ganglion cells to fire less vigorously.

Centre stimulation of ganglion cells enhances their response.

Even illumination of the receptive field ensures a strong response from ganglion cells.

More light always helps with seeing pedestrians at night.