Aniseikonia

This code represents aniseikonia, a binocular visual condition where the perceived size and/or shape of an image differs between the two eyes. This discrepancy can lead to visual discomfort, asthenopia, and difficulties with depth perception or spatial localization. It is often a consequence of unequal refractive errors (anisometropia) or surgical interventions.

Use this code when documentation explicitly states a diagnosis of aniseikonia. This condition is typically identified during a comprehensive ophthalmological examination, often involving specialized testing like an eikonometer or subjective comparison of image sizes. Supporting documentation should detail the patient's symptoms related to image size disparity between the eyes.

• Do not confuse aniseikonia with anisometropia (H52.3-), which is a difference in refractive power between the eyes, although anisometropia is a common cause of aniseikonia.
• Code any underlying refractive error (e.g., H52.1-, H52.2-) or other ocular conditions contributing to the aniseikonia as additional diagnoses.
• Ensure the provider's documentation clearly distinguishes between the cause (e.g., anisometropia) and the effect (aniseikonia).