what is the proper terminology for these step-bevels?

[Prentice Pro 9000]

I have two jobs. One has a direct 90 degree step around the lens. The other one was slanted. I wanted to explain to the lab what I wanted but I realized I lacked the vocabulary for it.

The first two images are what I want. The second two are what I do not want. thanks in advance!

[Plausible]

I have two jobs. One has a direct 90 degree step around the lens. The other one was slanted. I wanted to explain to the lab what I wanted but I realized I lacked the vocabulary for it.

The first two images are what I want. The second two are what I do not want. thanks in advance!

The simplest answer is you want the first lens with less step so there is no visible ring around the inside eyewire. Take picture 1 send with an email and ask for no gap on a remake, done.

A labs edger that does step bevels has a program to calculate the step bevel tool do its job most effectively.
This program calculates an amount of as you say "slant" for both the bevel tool and step tool. It is physics within the machine, the tools and the lens. The amount of slant is different for each lens base, each lens shape, size and frame curve. Less slant on flat front lenses, more slant on the most curved lenses.
Again your example has to do with step depth not slant.
Step depth is up to the operator, ask them to do better.
Calculation of slant is up to the edger software program, asking to change this to 90 degrees all the time will result in poor fitting lenses with too much step depth.
Go to U tube and search Laramy K Optical and watch their video High curves and step bevels for a much better explanation than I can do.

[PRECISIONLAB]

The simplest answer is you want the first lens with less step so there is no visible ring around the inside eyewire. Take picture 1 send with an email and ask for no gap on a remake, done.

A labs edger that does step bevels has a program to calculate the step bevel tool do its job most effectively.
This program calculates an amount of as you say "slant" for both the bevel tool and step tool. It is physics within the machine, the tools and the lens. The amount of slant is different for each lens base, each lens shape, size and frame curve. Less slant on flat front lenses, more slant on the most curved lenses.
Again your example has to do with step depth not slant.
Step depth is up to the operator, ask them to do better.
Calculation of slant is up to the edger software program, asking to change this to 90 degrees all the time will result in poor fitting lenses with too much step depth.
Go to U tube and search Laramy K Optical and watch their video High curves and step bevels for a much better explanation than I can do.

Terminology is correct. Just adding that what you don't want is a shelf bevel.

[Prentice Pro 9000]

The simplest answer is you want the first lens with less step so there is no visible ring around the inside eyewire. Take picture 1 send with an email and ask for no gap on a remake, done.

A labs edger that does step bevels has a program to calculate the step bevel tool do its job most effectively.
This program calculates an amount of as you say "slant" for both the bevel tool and step tool. It is physics within the machine, the tools and the lens. The amount of slant is different for each lens base, each lens shape, size and frame curve. Less slant on flat front lenses, more slant on the most curved lenses.
Again your example has to do with step depth not slant.
Step depth is up to the operator, ask them to do better.
Calculation of slant is up to the edger software program, asking to change this to 90 degrees all the time will result in poor fitting lenses with too much step depth.
Go to U tube and search Laramy K Optical and watch their video High curves and step bevels for a much better explanation than I can do.

So the first one with the ring actually fits better that the slanted one pictured. Also, the Laramy K video does not mention the machine having any control over the angle of the shelf.

[Prentice Pro 9000]

Terminology is correct. Just adding that what you don't want is a shelf bevel.

Heyyyyy!!! thank you! where did this image come from btw?

[Lensman11]

Give the measurement to the lab of the step depth and the angle of the incline. A good edging will follow you’re instructions.