+ Difference between pterygium and<unk>  Pterygium<unk>  Etiology Degenerative process Inflammatory process Age Common in adults Occur in any age Site Horizontally, most commonly nasally Anywhere Status Progressive(commonly) or stationary Always stationary Neck Adherent to limbus Free Probe test Probe cannot be passed underneath Probe can be passed under neck }
Pseudopterygium
Pinguecula
Oral torus
Epiblepharon
Caput Medusae
Ranula
Torus palatinus
Caput medusae