Triangular visible white-colored mass on the sclera
Foreign body sensation with irritation, pruritus, tearing, dryness
Does not cross the limbus or enter the visual axis (differentiates<unk>  from a pterygium)
Pinguecula
Acute angle-closure glaucoma
Ranula
Conjunctival abrasion
Chalazion
Corneal foreign body
Pterygium
Corneal ulcer