2012年5月14日 · The axis is defined with a number from 1 to 180. The number 90 corresponds to the vertical meridian of the eye, and the number 180 corresponds to the horizontal meridian. If an eyeglass prescription includes cylinder power, it also must include an axis value, which follows the cyl power and is preceded by an "x" when written freehand.

2013年4月2日 · On the other hand, axis describes the lens meridian that contains no cylinder power to correct astigmatism. And it is defined with a number from 1 to 180. The number 90 corresponds to the vertical meridian of the eye, and the number 180 corresponds to the horizontal meridian. So they are different from each other.

Yes, the astigmatism axis is very important to make prescription eyeglasses if you have astigmatism. If you provide incorrect astigmatism axis, you may get blurred vision or headaches even if the eyeglasses are made in exactly the right SPH, CYL and PD etc.

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2012年9月24日 · The eye prescription is a result about whether you need visual correction. There are a series of items are measured by number within a plus (+) or minus (-) sign. For example, minus means you are myopic and plus is described as hyperopic.

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2012年5月15日 · I have vsp eye insurance and want to get my glasses frames from Walmart. Will it accept my VSP? In Vision insurance -Asked by : crc32 -4 answers -08/02/2012

2012年11月15日 · And the pink eye is infectious conjunctivitis, which is an acute infectious ophthalmia which can be caused by many reasons. One of the main reasons is the viral conjunctivitis. You should use the amoxicillin to get rid of the bacterium in the eyes which will help you get well quickly.

2012年6月18日 · Glasses Sunglasses Contacts Eye Health Eye Exam Glasses Care Eye Doctor Vision Problems LASIK & Vision surgery Vision insurance Other Goggles Firmoo > Answers > Glasses > question