What should I do if my baby has one big eye and one small eye?

One eye is big and the other is small, which may be caused by congenital developmental anomalies, myasthenia gravis, or motor nerve palsy, etc. Children can be treated with medication or surgery as prescribed by the doctor to improve their appearance.
1. Congenital developmental abnormality: Some babies have congenital eyelid developmental abnormality such as double eyelids in one eye and single eyelids in the other eye, or differences in the size of the extraocular muscles and the size of the eyeballs, etc., which may lead to the phenomenon mentioned above. If there is no significant impact on vision or aesthetics, there is no need to deal with, if necessary, surgical correction, such as blepharoplasty.
2. Myasthenia gravis: Myasthenia gravis is an autoimmune disease targeting the postsynaptic membrane acetylcholine receptor at the neuromuscular junction. The extraocular muscles are paralyzed due to the neuromuscular signaling obstacle, which leads to eyelid ptosis on the affected side, and the child may have a large or small eye. Children can be treated with neostigmine, azathioprine and other drugs as prescribed by the doctor, and the thymus gland needs to be removed if necessary.
3. Actinic nerve palsy: children with actinic nerve palsy can also have ptosis, and can be treated with adenosylcobalamin, methylcobalamin and other medications as prescribed by the doctor to nourish the nerves and improve the appearance.
It is recommended that children with eyes of different sizes consult a doctor to evaluate their condition and follow the doctor’s instructions for treatment.