Other disorders of eye and adnexa (H55-H57)

ICD-10 codes H55 to H57 cover various other disorders of the eye and adnexa that involve abnormal eye movements, unusual pupil functions, ocular pain, and miscellaneous eye-related conditions. These codes help classify specific eye movement irregularities, pupillary anomalies, and eye discomfort not captured in other categories.

The H55 series includes codes for different types of nystagmus, such as unspecified, congenital, latent, and visual deprivation nystagmus. Common terms like "irregular eye movements," "manifest nystagmus," and "jerk nystagmus" link here, assisting in coding for involuntary eye oscillations. Codes H55.8X detail other irregular eye movements, including deficient saccadic or smooth pursuit eye movements, important for diagnosing neurological or vestibular disorders. The H57 codes address anomalies of pupillary function including anisocoria (unequal pupil size), miosis (constricted pupils), and mydriasis (dilated pupils). Terms like "Argyll Robertson pupil" and "tonic pupil" help clarify these conditions. Additionally, ocular pain codes specify laterality and nature of eye discomfort, while other specified disorders capture rare or complex conditions like brow ptosis and foreign body sensation. This range provides detailed classification for specialized eye conditions frequently encountered in ophthalmology and neurology clinics.