The two stations share studios on Boush Street in downtown Norfolk; WTKR's transmitter is located in the northwest part of Suffolk, Virginia.
The station began operation on channel 4 on April 2, 1950 as WTAR-TV, Virginia's second television station.
It carried programming from all four networks of the time—NBC, CBS, ABC, and Du Mont—but was a primary NBC affiliate.
In its first year of operation, when only 600 TV sets existed in the area, it had 19 locally originated programs in addition to network shows.
And a report warned 'it is now clearer than ever that we are facing a global epidemic' of sight loss - particularly for the millions of children who are exposed to digital screens earlier than ever.
Lead researcher Dr Celia Sanchez-Ramos, of the University Complutense of Madrid in Spain, said: 'It is paramount for adults and parents to act now and protect themselves from further damage.' 'We are really proud to be part of this exciting and rewarding initiative with Channel 4 and the advertisers.'The campaign will be repeated in the following break at 9.30pm with the addition of audio description for viewers with a visual impairment.
Those firms who have signed up to the campaign, part of National Eye Health week, include Amazon Echo, Paco Rabanne, 02, Freeview and Specsavers.