1. Vision enhancement apparatus for a vision-impaired user of interface equipment, comprising: a passive sensor to acquire real-time high resolution data representing the vicinity of the user; and a sight processor to receive the acquired high resolution data and automatically analyse the high resolution data to extract depth of field information concerning objects of interest, extract lower resolution data representing the vicinity of the user and provide both the depth of field information concerning objects of interest and the lower resolution data representing the vicinity of the user of the interface equipment to directly or indirectly stimulate the user's cortex to provide artificial vision of the depth of field information and the low resolution data for the user.