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Eyewear
Eyeglasses, goggles or other objects worn over the eyes, usually to aid vision or for protective purposes.
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Eyewear > Contact lenses 
with-the-rule astigmatism
Eyewear; Optometry
With the rule astigmatism has an axis of about 180 degrees (when Rx is written in minus cylinder form). "Against the rule" astigmatism has the axis at about 90 degrees. Both forms ...
Sub-categories
- Contact lenses (3070)
- Eye surgery (2811)
- Glasses (802)
- Optometry (16172)
- Sunglasses (524)