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Can your astigmatism prescription numbers change from-1.00 cyl and 105 axis to plus 1.00 cyl and 015 axis in 2 years?
Wiki User
∙ 11y ago
Since nobody qualified has answered this, I will speculate. I AM NOT AN EXPERT. I think the change in sign and the shift of 90 degrees are equivalent, and some examiners prefer to write it one way and others write it the other way. Did your sphere also jump by about -1 in the same time? Astigmatism is basically one correction in one direction and a different correction at a right angle to that. This is usually written as the one correction and the difference to be applied to make the other correction. Sphere -1 cylinder -1 axis 105 adds up to -2 along the 105 degree direction, and -1 along the 15 degree direction. A prescription of sphere -2 cylinder +1 axis 15 also adds up to -2 along 105 degrees and -1 along 15 degrees.
Wiki User
∙ 11y ago
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What is corneal astigmatism?
Astigmatism is blurred vision caused by an irregularly shaped cornea. Astigmatism is when the cornea of the eye is shaped like a rugby ball rather than being spherical. It causes the eye to have two focal points rather than one and can lead to strain and headaches if uncorrected. Astigmatism is the 'Cylinder' value in a prescription. Around 70% of people who wear spectacles have astigmatism. It can also be corrected with toric contact lenses and laser eye surgery. People with severe astigmatism may experience double vision if it not corrected. Astigmatism can indeed worsen with time, as the eye grows and changes. There is nothing you can do to prevent this change and it will only require a change to the prescription in your glasses in order to correct your vision. It is also possible for the astigmatism to go away. It's when the eyeball is not perfectly round.
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