rafter has more than 1.5 million viewers created by dennis fong. he's the most famous video game player of his era. if you're of a certain age, dennis fong is the joe nameth of video games. joined by jacob ward and michelle quinn of the mercury news as well. going back to all of those people packing the s.a.p. center, if you walk through the s.a.p. center, is it like people saying, who is that old guy? >> it's definitely the latter. the funny thing is, i was named fresh. that was my handle in games. they named a champion after me in the game that they were playing in. >> really? >> at the s.a.p. center. most people don't know, but -- the majority of people don't know, which is pretty funny. but it's pretty cool. >> you're in the guinness book of world records, right, as the first great champion of back in the doom and quake days. you're in the guinness book of world records for video games. >> that's right. when i was playing, there was no such thing as professional video gaming. it kind of fell into my lap, literally. >> how was that possible? how

dennis fong is a clinical instructor at uc berky's school -- -- berkeley's school of optometry.y're seeing it more in young children. >> they're stressed. >> reporter: while we need more in the morning to wake up, blue light releases melatonin, a hormone that influences the body's biological clock. >> using them late at night could disrupt sleep and this has an impact on general health. >> reporter: as the sun sets, the light in your device will turn to a warmer yellow. blue light blocking lenses. cal student anna bought a pair of them. >> i would rather be safe than sorry, if i can can be more comfortable, i'd do it. >> reporter: i'm allen martin, kpix 5. >>> and eye doctors stress that you shouldn't be too anxious about using your digital device since it is unproven that they are likely the cause damage in young, healthy eyes. but they also welcome software developments that filter out the blue light. >>> it's on. organizers have given the green light to the mavericks surf contest. the announcement was made today on the event's official website. the surf contest is now set for

dennis fong is a clinical instructor at uc- berkeley's school of optometry.hey are seeing more cases of digital eye strain in young people. the symptoms are headaches, dry eyes and blurred vision. >> so the focusing ability is being stressed. >> reporter: and while we need blue light in the morning to wake up, at night blue light suppresses the release of melatonin a hormone that influences the body's biological clock. >> using computers and blue light phones, late at night, can really disturb sleep and this is likely to impact general health. >> reporter: a software feature tested by apple may help. as the sun sets the light will go from blue to a warmer yellow in your device. another solution? blue light blocking lenses. this cal student bought them. >> i would rather be safe than sorry and if i can be any more comfortable i'm willing to do it. >> reporter: in berkeley, allen martin, kpix 5. >> eye doctors stress that you shouldn't be too anxious about using your digital devices since it's unproven they are likely to cause damage. but doctors welcome the so