Plano Concave on 1.5 index?

[Bok]

I received back a job from our lab today the rx was -6.50/-0.75x80 R+L the lenses were flat front surface, plano concave, I am sending them back and specifying a front curve for them but want to know the following,

I am wanting to set the front curve at +2 to give it some curve to the lenses I know this will make the edge thickness worse but would there be any visual problems that might crop up from doing this? or problems regarding fit into frame?

I will be using 1.67 index and specifying the +2 front curve, I am fitting into a nylon supra with a eye size of 58mm. frame is made from acetate plastic. O.C's are 31 R+L and height set at 26mm above rim.

[MikeAurelius]

Edge thickness will not change (providing the index does not change): any curve added to the front just adds the same curve to the back, resulting in zero increase in edge thickness.

[LENNY]

Edge thickness will not change (providing the index does not change): any curve added to the front just adds the same curve to the back, resulting in zero increase in edge thickness.

Theoretically!
According to the formulas!

In real life it might be a bit thicker..... Just my experience...

[Robert Martellaro]

Edge thickness will not change (providing the index does not change): any curve added to the front just adds the same curve to the back, resulting in zero increase in edge thickness.

Flatter base curves do decrease the edge thickness. That's why aspheric (front) lenses are thinner; it's due to the flatter base curve, not the asphericity.

I received back a job from our lab today the rx was -6.50/-0.75x80 R+L the lenses were flat front surface, plano concave, I am sending them back and specifying a front curve for them but want to know the following,

I am wanting to set the front curve at +2 to give it some curve to the lenses I know this will make the edge thickness worse but would there be any visual problems that might crop up from doing this? or problems regarding fit into frame?

I will be using 1.67 index and specifying the +2 front curve, I am fitting into a nylon supra with a eye size of 58mm. frame is made from acetate plastic. O.C's are 31 R+L and height set at 26mm above rim.

Bok, use the Base Curve that the lens manufacturer recommends, and place the vertical optics according to Martin's rule for tilt, unless the manufacturer recommends a center pupil position (Shamir), possibly with prism thinning. Try to fit close, and keep the pupil center no more than 5mm above center (the datum or 180 line).

[GokhanSF]

58 eye size frame with -6.50 -0.75 Rx and 62 PD ???? I would question the frame choice before I place a redo for base curve.

[Bok]

58 eye size frame with -6.50 -0.75 Rx and 62 PD ???? I would question the frame choice before I place a redo for base curve.

Gokhan I have already questioned frame choice three times, customer is reglazing a frame he has purchased elsewhere and is stubborn and does not want to change it.

Robert you have been very helpful, thank you very much.