Where do the signals of the two eyes first meet in a single neuron? · Grey Matter

Although the chiasm sends both eyes' views of one half-field into the same optic tract, the lateral geniculate nucleus of the thalamus keeps them apart, in separate layers for each eye.

Where do the signals of the two eyes first meet in a single neuron?

Although the chiasm sends both eyes' views of one half-field into the same optic tract, the lateral geniculate nucleus of the thalamus keeps them apart, in separate layers for each eye. The first neurons that respond to both eyes are in the primary visual cortex, beyond its input layer, where the inputs from the two eyes arrive in alternating bands (ocular dominance columns) and then converge. Neurons there are tuned to small differences between the two retinal images, the raw material of stereoscopic depth in the central binocular field, about 120 degrees wide.