Current RMA Instruments
Reasonable Hypothesis SOP | 33 of 2025 |
|---|---|
Balance of Probabilities SOP | 34 of 2025 |
Changes from previous instruments
ICD Coding
- ICD-10-AM Codes: H11.0
Brief description
Pterygium is a benign triangular or wedge-shaped growth on the surface of the conjunctiva (the clear membrane that covers the white part of eye) that can extend into the cornea. The growth develops within the space between the upper and lower eyelids when the eyes are open. This space is known as the interpalpebral fissure and extends from the conjunctiva near the nose to the cornea, the dome-shaped outermost layer of the eye.
Confirming the diagnosis
Diagnosis is usually made on the characteristic clinical appearance and location of the lesion by a specialist general practitioner, optometrist or an ophthalmologist.
Additional diagnoses covered by the SoPs
- Surfer's eye (lay term for this condition)
- Farmer's eye (lay term for this condition)
Conditions not covered by these SoPs
- Pinguecula* - Pinguecula SOP
- Pseudo-pterygium #
- Pterygium of the nail #
- Antecubital pterygium # (Antecubital pterygium syndrome)
- Popliteal pterygium # (Popliteal pterygium syndrome)
* another SOP applies
# non-SOP condition
Clinical onset
The clinical onset of pterygium will generally align with the date of diagnosis. However, backdating may be appropriate where there is evidence of continuous chronic symptoms predating the diagnosis- such as persistent foreign body sensation, tearing, dryness or itchiness in the affected eye.
Clinical worsening
Pterygium may progressively worsen over time and impair vision. An inability to obtain appropriate clinical management therefore can worsen this condition. While surgical treatment can be effective, recurrence is possible.