I know you asked about Zenni specifically, but your questions about photochromic lenses probably apply to many vendors.
What do you like about them? It's nice to have them if I forget to bring my clip-on. What don't you like about them? You have to look directly at the sun to get them to darken. When driving, they are little help at all and will not help with glare. Do they darken/lighten quickly? How quickly? They darken rather quickly. They take much longer to turn clear again. When they turn dark are they as effective in blocking sunlight as regular (80%) tinted lenses? IMO, no. I still wear a clip-on in sunlight. How well do they work in cold or hot weather? They work better in cold weather than in hot. Over all, I am sort of ambivalent about them. I thought I could dispense with a clip-on but that turned out to not be the case. I would never pay a lot for photochromic. To me they are a back-up for the clip-on. If I am going out to lunch, I will often just use the photochromic lenses and not bother with my clip-on. They are not (IMO) as cool as they look on TV. Dave -- Check us out at the oft-updated http://glassyeyes.blogspot.com! You received this message because you are subscribed to the Google Groups "GlassyEyes" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/glassyeyes?hl=en
