Question

what is with the rule astigmatism and against the rule astigmatism​

Answer 1

Answer:

Explanation:

Against-the-rule astigmatism: In this type of astigmatism, the horizontal meridian stays close to 180˚. It is steeper than the vertical meridian. Against-the-rule astigmatism is common in the elderly. Oblique astigmatism: If the principal meridians are not at 90˚ and 180˚, it is categorized as oblique astigmatism.

Answer 2

Answer:

With-the-rule astigmatism: This type of astigmatism is common among children where the vertical meridian is the steepest and it stays close to 90˚. Against-the-rule astigmatism: In this type of astigmatism, the horizontal meridian stays close to 180˚. It is steeper than the vertical meridian.

Explanation:

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