CAPE CANAVERAL, Fla. — Solar glasses are a must for safe viewing of Monday's total solar eclipse, the first to span coast to U.S. coast in 99 years.And parents beware: Eye doctors urge strict adult supervision for eclipse watchers under 16 years old.There should be absolutely no peeking without eclipse glasses or other certified filters except during the two minutes or so when the moon completely blots out the sun, called totality. That's the only time it's safe to view the eclipse without protection. When totality is ending, then it's time to put them back on.Totality means 100 percent of the sun is covered.