Get a quick, patient-friendly answer to how much of the page a magnifier shows, in centimeters. Enter the lens diameter, lens power and lens-to-eye distance.
This is the fast version of the Advanced Field of View Calculator. Instead of angles and illumination zones, it gives one number: the width of the visible field in centimeters. That's usually what a patient wants to know, such as whether a magnifier covers a full newspaper column.
Inputs:
- Lens diameter (mm): a bigger lens shows more.
- Lens power (D): a stronger lens shows less.
- Lens to eye distance (cm): bringing the magnifier closer shows more.
It's handy chairside. Use it to show a patient how moving the magnifier closer to their eye opens up their reading view.
