Ask the expert

What does sphere mean on my prescription?

Answer: 

Sphere refers to the power of your lens (measured in dioptre units) to correct the degree of short or long sight you have.

Commonly, this number will be different for each eye.

The figures will have a plus sign if you're longsighted and a minus sign if you're short-sighted.

Was this answer helpful?

We recommend you seek professional advice if you are concerned about your eye health

Book an eye test

Search for more answers: