Irregular astigmatism

What it means

A type of astigmatism in which the principle meridians are not 90 degrees apart and which is associated with loss of vision.

Rare diseases that can present with this2

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category