Corrective Lens Equation for Nearsightedness
The corrective lens equation for nearsightedness relates the far distance for a person to the necessary lens power to correct it.
The reciprocal of the far point for nearsighted vision is directly proportional to the lens power or the spherical component of a lens prescription.
Formula
![Copy to Clipboard -QuantityVariable[Subscript["d", "max"], "Distance"]^(-1) == Quantity[1, "Meters"^(-1)]*QuantityVariable["C", "OpticalPower"]](https://www.wolframcloud.com/objects/resourcesystem/marketplacestorage/resources/798/79818dfb-f7a2-4b49-86f7-73b04e484b1f/Webpage/FormulaImage.png)
| symbol | description | physical quantity | 
|---|---|---|
| dmax | far point for nearsighted vision | "Distance" | 
| C | lens power | "OpticalPower" | 
Forms
Examples
Get the resource:
| In[1]:= | ![ResourceObject["Corrective Lens Equation for Nearsightedness"]](images/798/79818dfb-f7a2-4b49-86f7-73b04e484b1f-io-1-i.en.gif) | 
| Out[1]= |  | 
Get the formula:
| In[2]:= | ![FormulaData[
 ResourceObject["Corrective Lens Equation for Nearsightedness"]]](images/798/79818dfb-f7a2-4b49-86f7-73b04e484b1f-io-2-i.en.gif) | 
| Out[2]= |  | 
Use some values:
| In[3]:= | ![FormulaData[
 ResourceObject["Corrective Lens Equation for Nearsightedness"], {}]](images/798/79818dfb-f7a2-4b49-86f7-73b04e484b1f-io-3-i.en.gif) | 
| Out[3]= |  | 
 
                 
                