Change your lenses
Eyeglasses Mounting on your rimmed frame-
1 - Choose your lenses
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2 - Enter your prescriptionClose
SPHERE
The "sphere" corresponds to the correction of myopia or hyperopia.
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If the value is negative (e.g.: -2.00), it means you are myopic (you can't see well at a distance).
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If the value is positive (e.g.: +1.50), it means you're hyperopic (you have trouble seeing up close, especially when reading).
Where to find it on the prescription :
It's usually indicated in a column entitled "Sphere" or "SPH", next to each eye (OD = right eye, OG = left eye).Example:
Eye Sphere Cylinder Axis Addition OD -2.00 (-0.75) 180 +2.00 OG -1.50 (-0.50) 175 +2.00 Here, the sphere is -2.00 for the right eye and -1.50 for the left.
CloseCYLINDER
The "cylinder" (or CYL) corresponds to the correction of astigmatism, i.e. a curvature defect of the cornea that makes vision blurred or distorted.
Where to find it on the prescription :
It can be found in the "Cylinder" or "CYL" column , right next to the "Sphere" column , and is usually accompanied by an axis expressed in degrees. The value is often noted in brackets.Example:
Eye Sphere Cylinder Axis Addition OD -2.00 (-0.75) 180 +2.00 OG -1.50 (-0.50) 175 +2.00 Here, the cylinder is -0.75 for the right eye and -0.50 for the left.
CloseAXIS
Theaxis indicates the orientation of the astigmatism correction:
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The axis is expressed in degrees (°), from 0 to 180.
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It specifies the direction in which the cylindrical correction should be positioned in the lens.
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Without a cylinder, there's no axis (since it only serves to correct astigmatism).
Where to find it on the prescription:
It's in the "Axis" column , right next to the "Cylinder" column .Example:
Eye Sphere Cylinder Axis Addition OD -2.00 (-0.75) 180 +2.00 OG -1.50 (-0.50) 175 +2.00 Here, the axis is 180° for the right eye and 175° for the left.
CloseADDITION
Addition (or ADD) corresponds to the correction required for near vision, in addition to distance correction:
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It is mainly used for presbyopes (near vision decreases with age).
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It is the value added to the sphere to obtain good near vision.
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It is always positive (e.g.: +2.00).
Where to find it on the prescription:
It can be found in a column or row entitled "Addition" or "ADD", often under the distance corrections or at the end of the table.Example:
Eye Sphere Cylinder Axis Addition OD -2.00 (-0.75) 180 +2.00 OG -1.50 (-0.50) 175 +2.00 Here, the sum is +2.00 for each eye, which means that additional correction is required for reading or close-up vision.
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3 - Choose your lens thinning Aide
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4 - Choose your lens coatings and options
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