According to (Priebe, 2016), Retinal ganglion cells and LGN cells have symmetrical circular receptive fields. Most dramatic transformations via receptive fields happen in the V1.
Source: Priebe, N.J. (2016) ‘Mechanisms of Orientation Selectivity in the Primary Visual Cortex’, Annual Review of Vision Science, 2(1), pp. 85–107. Available at: https://doi.org/10.1146/annurev-vision-111815-114456.