Complex sentence: Another pioneer in this field was Sony who released the Glasstron in 1997, which had as an optional accessory a positional sensor which permitted the user to view the surroundings, with the perspective moving as the head moved, providing a deep sense of immersion.
Split into simpler sentences: Another pioneer in this field was Sony, which released the Glasstron in 1997. It had as an optional accessory a positional sensor which permitted the user to view the surroundings, with the perspective moving as the head moved, providing a deep sense of immersion.