Skip to main content

Buying lenses with a different base curve and diameter

I want to order some contact lenses but the base curve and diameter don’t match the prescription my optician gave me. A friend said she found the lenses really comfortable, and the difference between the numbers is really small. Can I order them anyway?

Optician's answer

I’d recommend that you only order the exact prescription given to you by your Optician. Even a small difference in the base curve and diameter measurements can affect how the contact lens sits on your eye. If you end up wearing an incorrectly fitting contact lens it can damage the health of your eye and cause blurred vision.

Everyone’s eyes are different, so what’s suitable for one person may not be suitable for someone else. If you’re unhappy with the comfort of your lenses, I’d suggest speaking to your Optician about trialling some new lenses.