Pterygium is a membrane like thing growing on nasal or temporal side of the Eye.Sometimes it becomes red & requires treatment. It may require removal if it shows signs of growth or for cosmetic purposes. Different techniques are available which include simple excision by Bare sclera Technique or with Grafts.
Chalazion is a painless bump on upper or lower eyelid which does not respond to medication. It may require a minor procedure for cleaning of the pus/fluid inside it.