Need Aspherical Lens Equation (+20d, 55mm)

[Raza121]

Hello.
I am not related to physics or any optics related field.
I am in need of equation for +20d aspherical lens of diameter 55mm.
Can anybody help me?

 

[Khashishi]

The shape is definitely going to depend on the index of refraction of the material it is made out of.

 

[berkeman]

Hello.
I am not related to physics or any optics related field.
I am in need of equation for +20d aspherical lens of diameter 55mm.
Can anybody help me?

Welcome to the PF.

When I go a Google search on the title of your thread, the first non-advertisement link is this one for wikipedia. It looks to have what you need (as long as you know the index of refraction of your material, as already pointed out)...