Table of Contents
What happens if your prescription is too high?
When your prescription is too high, you will notice that you begin to feel dizzy and nauseous within some time of wearing your prescription glasses or lenses. This is a sure indication of a wrong prescription.
How do I know if my prescription glasses are correct?
If you experience any of these symptoms for an extended period of time, after the adjustment period, your prescription may be incorrect:
- Extreme blurring of vision.
- Lack of focus.
- Poor vision when one eye is closed.
- Excessive eye strain.
- Headaches or dizziness.
- Vertigo or nausea, unrelated to a medical condition.
What is considered severe astigmatism?
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.
How do I know if my astigmatism prescription is wrong?
Can your eye axis 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.
What causes astigmatism axis to 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 does your eye prescription axis information say about you?
Your optician might have informed you about your specific eye prescription axis information, or they may have suggested the best axis glasses for you. Further, they may have even notified you about weak eyesight, nearsightedness, or farsightedness, and whether you have astigmatism.
Should I be concerned if my axis and Cyl measurements change?
If you compare your current prescription to an older one you may notice that your AXIS and CYL measurements have changed slightly. This is not uncommon, as eyesight can undergo several changes throughout one person’s lifetime. As long as your AXIS and CYL measurements have been taken correctly, it should give you no cause for concern.
What do the letters in eye prescription numbers mean?
Most eye prescriptions show the value for the axis, which is often accompanied by a cylinder power symbol represented by the alphabet ‘x’. It is often written along with the axis number, for instance, x10, x180. A cylinder value refers to the power that you need for correcting your astigmatism.
What is an axis in glasses?
What is an axis in glasses? It is a very common question that many people ask when they do not have enough information regarding their prescription. An eye axis defines the lens meridian. Meridians of an eye are calculated by using a superimposed protractor scale which is visually placed in front of the eye.