When passing the oncoming lighted vehicle the driver has:
To track the driving of the lighted oncoming vehicle, to avoid looking into turned-on lights to prevent dazzling and short-time loss of sharp sight.
To monitor the track of the oncoming vehicle by looking into turned-on lights; no dazzling and short-time loss of sharp sight cannot occur during such a short period of time.
To track only my own driving direction. Behaviour of oncoming vehicles creates no danger.