These appear to have been carved over glasses for my prescription glasses so they are adapting well. No flare or on the top or on the sides, no inadvertent sliding of the assembly. The visual impression is excellent but more dazzling clarity. Beware of times when we go in the shade if it is dense enough, then this is too dark ... but there are not many dark tunnels in my area ... For years I n 'that was using "fronts" removable, it's a huge relief!
