Does the axis of contact lenses matter?

Does the axis of contact lenses matter?

The higher the number, the stronger the visual correction needed. Diameter (DIA): The diameter of the contact lens is also written in millimeters and determines the width that best fits your eye. The Axis is always a number between 0 and 180 degrees.

What is considered a bad astigmatism axis?

75 and 2 diopters is considered mild astigmatism. Between 2 and 4 diopters is moderate astigmatism, and 4 or more diopters is considered significant or “bad” astigmatism. Generally, eyes with 1.5 diopters of astigmatism or more require correction.

Is it normal for eye axis to change?

Small changes to the shape of your cornea can often cause large changes in the axis measurement, although these are rare. If the axis has changed by more than 90 degrees, you may wish to clarify this with our eye doctor, as a variation this large is quite unusual.

Can your astigmatism axis change?

Unfortunately, astigmatism prescriptions can change and often do so with advancing age. Small changes to the shape of your cornea can often cause large changes in the axis measurement, although these are rare.

What causes astigmatism to get worse?

This Eye Condition Only Gets Worse Over Time As with almost every single eye condition, astigmatism only gets worse over time. The main reason for this is that, over time, the astigmatism changes angle and, without glasses or contact lenses at the very least, it only worsens.

Can I wear contacts with a different base curve?

Can I order contact lenses with a different base curve? You should never order contact lenses with a base curve that is different from your prescription. This can damage your eyes and cause problems with vision.

What happens if my glasses axis is different from my real axis?

Answer Wiki. The thing about a prescription that is affected by the axis is the cylinder-ie the correction for astigmatism. Generally speaking, if the glasses axis is different from your real axis by a few degrees, you wouldn’t notice a difference.

What do the Axis numbers mean on a contact lens prescription?

Typically given in 10s, the axis figure on a contact lens prescription can be between 1 and 180. Ninety means that the cylindrical power is positioned vertically to correct your astigmatism, whereas 180 would suggest it is positioned horizontally.

What happens if you wear the wrong prescription contacts?

A patient may also notice eye strain, headache & slight dizziness with wrong prescription contact lenses. Your doctor will recommend you with either glasses or prescription contact lenses thorough eye exam studies.

What happens if my astigmatism is too far off the Axis?

If the glasses axis was at 90 degrees to your real axis, then your astigmatism amplitude would be doubled (while wearing the glasses). So-what happens depends on how far off it is. The further off it is, the more residual astigmatism you will have and the more remaining blurring you may have.