In an eye with astigmatism, light fails to come to a single focus on the retina to produce clear vision. Instead, multiple focus points occur, in front of the retina or behind it, or both. This causes blurred vision at all distances.

Astigmatism is a type of that occurs when the cornea is irregularly shaped, or in some cases as a result of the curvature of the lens inside the eye. The does not focus light evenly on the retina. The cause of astigmatism is not yet fully understood, but genetics and mechanical interactions between the cornea, eyelids and extraocular muscles may affect its development. Around 90% of the world’s population suffer from some degree of astigmatism.Approximately 50% of individuals worldwide have a degree of astigmatism that can be corrected with corrective lenses.

Astigmatism usually causes vision to be blurred or distorted to some degree at all distances. Symptoms may include squinting to see at all distances, difficulty focusing on printed words, eye strain, tired eyes and headaches.

Cylinder power

In addition to the spherical lens power used to correct myopia or hyperopia, astigmatism requires an additional cylinder lens power to correct the difference between the powers of the two principal meridians of the eye. 

Cylinder axis

This describes the lens meridian that contains cylinder power to correct astigmatism. If an eyeglass prescription includes cylinder power, it also must include an axis value. This shows the optician in which direction they must position any cylinder power in your lenses.

Not found what
you are looking for?

No worries, our team is here to support you
and answer your question.

Making eye care accessible to everyone

close

We have 3 short questions before we can get started.

1. The eye-exam takes about 20 minutes from beginning to end. Is now a good time?

● No lost time traveling or waiting for your appointment. The only minutes spent is on the test itself.

Glad to hear you’re not in a hurry. This will improve the results.

Do you have a smartphone, together with a laptop (or tablet), and 3 meters of space at your disposal?

● Your smartphone will function as a remote, and is also used together with a laptop (or tablet) to perform the online eye-exam.

That’s great! We’re almost good to go. Just one more thing.

Do you have your current eyewear prescription at your fingertips?

● Your prescription powers your eyewear. Our optometrists use your old one as areference for validating your new prescription.

Take the exam now, or save it for later?

Based on experience, we advise you to take your time with the online eye-exam to optimize your results. We can email you a link to proceed whenever you’re ready.

    If you want to do it right now or maybe you are just curious, no problem.

    Proceed

    Great, you’re all set!
    Let’s get started

    …redirecting to the eye-exam