The effects of pregnancy on the eye fall into three categories. Nonpathological physiologic changes in pressures, corneal sensitivity and thickness, and visual function can occur. Pathologic conditions reported to develop during pregnancy include central serous chorioretinopathy, hypertensive and vascular disorders, and uveal melanoma. Pregnancy also can affect pre-existing ocular conditions, such as diabetic retinopathy, tumors, and a variety of immunological disorders and can have beneficial effects on such pre-existing conditions as glaucoma. This review covers ocular disorders in these three categories, and summarizes the systemic changes of pregnancy and the effects of ocular medications on the fetus.