Excellent posing by Emma in Zenni glasses with lenses of minus ten. Looking at the sky is a useful trick. Note the sparkle in the lenses. Like ice crystals. This is why I call a lady's glasses her Crystal Veil. The sparkle effect would have been less if high index lenses were used. Also, the power rings would have come out in a more predominant way. Contradictory as it seems, the thick sides of the lenses take away a part of the power rings.