Just what I need for pre-night-time use
The lenses are light in weight and the clip allows then to flip up and down quickly & easily.  This is an important feature when deciding when to use them.  Or not.  So far, the clip has been secure and the lenses do not fall off in a dangerous way when lightly flipped with the thumb.<br /><br />NOTE: These are NOT for use in the lowest light situations.  When used with care, they are acceptable in the range of ordinary visual accommodation to different light levels, even *moderately* low levels.  I suggest strongly that they be tried out in three or four different low-light environments before they are worn while driving.  Look for detail edging and definition of dim objects.<br /><br />Further, I suggest that they be flipped up and down often in a *variety* of low-light driving situations before anyone settles upon a low-light-driving pattern.  Constantly re-examine your low-light usage until you get a good feel for when you can actually see better without them!  Low-light driving with these is NOT for the lazy.  If you use them, you must be ready at any time to flip them up and out of the way.  Seriously.
Rating: 5 stars