
26/07/2025
👁️ Looks similar, but not the same! Which is which?
Pterygium vs Pseudopterygium: Orientation & Attachment Matter!
🔸 Pterygium
➡️ Grows horizontally, most often nasally
➡️ Invades Bowman’s layer, firmly adherent across the limbus
➡️ Often UV-related and progressive
🔹 Pseudopterygium
➡️ Can appear anywhere, often oblique
➡️ Not truly adherent to the limbus — only at the apex
➡️ Caused by trauma, surgery, or inflammation
Bowman’s Probe Test:
If you can pass a probe under the apex → it’s a pseudopterygium (positive test)
If it’s firmly attached → likely a pterygium
📚 Source: Prabhakar et al.
Knowing the difference matters — for diagnosis and treatment!