The lesions typically are present at birth, benign, situated near the limbus, cystic, brown in color (very rare, red) and move with conjunctival manipulation.
Nevi may become enlarged and can be affected by hormonal changes such as in puberty, pregnancy, and with oral contraceptive use.
Nevi may occasionally be difficult to differentiate from melanoma and an excisional biopsy should be performed for suspicious appearing lesions.