The Vernon County Sheriff’s Department reports a driver says the sun was in his eyes and he failed to see the bicycle rider he hit early Tuesday morning.  The accident happened on County Road W-W in Hillsboro.  Sixty-six-year-old Gary Cepek of Hillsboro was thrown from his bike, then tumbled down an embankment before coming to rest.  Deputies say Cepek suffered life-threatening injuries.  No charges have been filed against the 20-year-old driver, though the investigation is continuing.