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Solar eclipse viewing glasses

Many of us have dispensed solar eclipse viewing glasses, but how many of us really know what to recommend and what not to recommend to our patients when it comes to viewing the solar eclipse directly or for how long? Of course, we all know indirect viewing is safe (pinhole viewing) with or without the eclipse glasses, but what about looking at the sun with them on? What is the difference between ISO certified glasses and non-ISO certified glasses? Is it OK to look directly at the eclipse with ISO certified glasses and, if so, for how long? What part of sunlight is dangerous to the eye and do the eclipse glasses block it? Regardless of what’s stamped on the temple how do you know if they are really ISO certified? What about welders glasses?

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Alan Glazier
Proud founder of a private practice in the Maryland suburbs of Washington DC. and I founded this small online community called "ODs on Facebook". I like to connect people.