Infants with large or small eyes should be examined by an ophthalmologist in a hospital to determine what condition is causing the problem, such as ptosis or congenital microphthalmia, which can be treated by surgery or other means. Ptosis is usually caused by a developmental abnormality that results in a weak contraction of the levator muscle inside the upper eyelid, which is unable to raise the upper eyelid to its normal position. Mild ptosis only affects the appearance of the eyes, while severe ptosis can obscure the pupil area and affect the child’s vision, requiring surgery. Congenital microphthalmos usually develops in both eyes, but there may be an imbalance in the development of the two eyes, with one eye being slightly larger and the other slightly smaller. There is no good treatment for this condition, but it can be monitored closely. If the patient develops complications, such as secondary glaucoma, surgical treatment, such as trabeculectomy, is feasible. It is recommended that children with ocular abnormalities seek prompt medical attention to evaluate their condition and follow medical advice.