AXIS = The degree, or direction, of your astigmatism. The axis number is between 1 – 180, indicating the “meridian” of your eye. This number indicates where on your lens the astigmatism correction should be located. ADD = Addition, meaning the additional correction you need for reading, ...
If you receive a contact lens prescription, there are additional terms and abbreviations to help with eye prescription meaning: PWR (Power)/SPH (Sphere): On a contact lens prescription, you may see the SPH written as Power, which is the strength of your prescription. These terms are interch...
Before you place your order, it's important to learn how to read your glasses prescription first. Get updated with this quick tutorial video.
When ordering corrective lenses online, it's vital that you enter everything correctly... particularly if you have a strong prescription. Reach out to alocal eye care professionalfor help translating your prescription. Or, if it's been a while since you've had your eyes checked, don't try...
SPH, CYL, AXIS and PD Normally, you can see them on the top of your prescription form. ‘SPH’ (sphere or spherical) meaning the degree of nearsightedness or farsightedness, and it indicates the value of lens power you need to see clearly. ‘CYL’ (cylinder or cylindrical) measures th...
This 1.00 D back surface cylinder (‘induced astigmatism’) must be compensated by generating a +1.00 D cylinder axis 180 on the front surface (Sarver et al., 1985). The front surface cylinder correction for the induced astigmatism is automatically incorporated into the lens prescription when ...
OS: Latin oculus sinister, meaning “left eye” If you have a heading labelled “OU,” which is Latin for oculus uterque, it pertains to “both eyes.” Other headings that your eyeglass prescription may have include SPH (Sphere): The number indicates the diopter (abbreviated as “D") requ...
When one of the two eyes has a higher prescription than the other, the image gets blurrier. The brain will pick signals from the eye with a lower prescription and superior vision, and the other eye does not have to function. Cataract:Causes cloudiness in the lensof the eye and objects ...
In this study, the use of actual measurement data eliminated potential bias or misclassification arising from spectacle prescription, while the sample size of over 5700 trios is sufficiently large to allow examination of only the right eyes without needing statistical adjustments to increase power. To...
A.DioptersB.Spherical ValueC.CylinderD.Axis 【小题3】From the prescription above we can learn that Li Hua ___. A.is farsightedB.is nearsighted C.has no astigmatismD.is normal in sight 【小题4】The text is probably taken from ___. A.an education...