Pinguecula: A yellowish-white nodule or bump on the conjunctiva, often near the cornea, typically caused by aging, UV exposure, or dry environments. It's a common and benign condition.

Pterygium: A growth of the conjunctiva or mucous membrane that covers the white part of your eye over the cornea, which is the clear tissue on the front of your eye. It's more common in people who spend a lot of time outdoors, especially in sunny climates.
Conjunctival cyst: A benign, fluid-filled lesion that can appear as a white nodule on the inner eye, often resulting from a blocked gland in the conjunctiva.
Lymphangioma: A rare, benign growth that consists of abnormal lymphatic vessels and can appear as a white or pink nodule on the conjunctiva or cornea.

Intraocular lymphoma: A rare and aggressive cancer that can present with a white nodule or mass in the eye, often associated with systemic lymphoma. Early detection is crucial for treatment and prognosis.
Retinoblastoma: A rare type of eye cancer that can cause a white reflex or nodule in the pupil, especially in children. Prompt diagnosis and treatment are essential to preserve vision and life.
Toxocara granuloma: A parasitic infection caused by the Toxocara roundworm, which can lead to a white nodule or granuloma in the retina or other parts of the eye.

Sjögren's syndrome-related conjunctival nodules: Autoimmune disorder that can cause dry eyes and, in rare cases, white nodules on the conjunctiva.
Conjunctival amyloidosis: A rare condition characterized by the deposition of amyloid protein in the conjunctiva, which can appear as white or yellowish nodules.
Conjunctival ossification: An extremely rare condition where bone tissue forms in the conjunctiva, potentially appearing as a hard, white nodule.