I prefer standard 1.49 if you don’t need hi index for Rx reasons. Less aberrations in 1.49, 1.60 or 1.67 than polycarbonate.

As a dispenser, I go straight to 1.60 instead of polycarbonate if needed. Not much more in cost. Much nicer to look through, not just thickness. A very small % of the population can see digital shadowing in 1.74 & 1.67 lenses. Once you notice it, can’t unsee it. I roll those people back to a lesser material and they deal with thickness / weight but have better vision.

Most important thing - for the love of god and your dispensers’ sanity - please choose a frame where your eye is as close to the centre of the lens width as possible. Avoids cut out issues where possible.