Complex sentence: However, simulations of the resultant pixelated images assume that all electrodes on the implant are in contact with the desired retinal cell; in reality the expected spatial resolution is lower, as a few of the electrodes may not function optimally.
Split into simpler sentences: However, simulations of the resultant pixelated images assume that all electrodes on the implant are in contact with the desired retinal cell. Therefore, the expected spatial resolution provided is even lower as a few of the electrodes may not function optimally.