Understanding Dioptres: A Guide to Measuring Optical Power

Dioptres (dpt) is a unit of measurement used to express the power of a lens or a mirror in optics. It is defined as the reciprocal of the focal length of a lens or a mirror, and it represents the ability of a lens or a mirror to focus light.

In other words, the higher the dioptre value, the more powerful the lens or mirror is, and the shorter the focal length. Conversely, the lower the dioptre value, the weaker the lens or mirror is, and the longer the focal length.

Dioptres are commonly used in eye care to measure the refractive power of glasses or contact lenses, as well as in photography and other fields where light is focused through lenses or mirrors.

I like this

I dislike this

Report a content error

Share

Report a content error

Thank you! Your form was successfully submitted.

We apologize! Your form could not be submitted. Please try again later.

Submit reports

Share

• 
• 
• 
• 
• 
• 
• 
• 
•