In article ,
Greg D. Moore \(Strider\) wrote:
A note of caution: safely low visible-light intensity doesn't necessarily
equate to safely low UV and IR intensity (especially the latter...

This is in fact my understanding of exactly why total eclipses are so
dangerous. You're not expecting the still high UV/IR does and your pupils
are more dilated than usual, allowing more light in.

If memory serves, total eclipses are safe for naked-eye viewing *during*
*totality*. But caution has to be exercised during the partial phases
before and after totality.
--
MOST launched 30 June; science observations running | Henry Spencer
since Oct; first surprises seen; papers pending. |