Which of the following is true regarding pterygium?

Ans: a (Occurs in inter palpepbral fissure mostly on nasal side)Ref: Parson, pg. 175-176Pterygium is a degenerative condition of the subconjunctival tissue which proliferates to invade the comea.lt usually involves the nasal side. When double, both nasal and temporal region is involved.Aetiology: Exposure to sun (UV radiation) Dry heat High wind Abundance of dustPterygium should be distinguished from a pseudoptyerygium which is an inflammatory process (by passing a probe underneath the neck of pseudo pterygium.)