Terson's syndrome = Terson described vitreous hemorrhages occurring in patients with subarachnoid hemorrhage and attributed it to a sudden increase in venous pressure that ruptures epipapillary and peripapillary capillaries. About 20% of patients suffering of subarachnoid, or subdural hemorrhages develop intraocular hemorrhages that in most cases are confined at the posterior pole. Intraretinal and subretinal bleeding may also be present, usually from the optic disc and retinal blood vessels. Subhyaloid hemorrhages are usually present. In most cases these hemorrhages clear spontaneously and vision function is unaffected.
Terrien's marginal degeneration = an uncommon but distinct variety of marginal thinning of the cornea. It is usually bilateral, although often asymmetric, and is seen mainly in younger men.
Uhtoff's phenomenon = Uthoff's phenomenon refers to visual problems that occur in persons with MS that are brought on during periods of increased body temperature. The usual history is of "black spots" appearing in the visual fields of one or both eyes while the person is exercising, in the sauna, taking a hot shower, or having a fever. This phenomenon is felt to reflect areas of impaired but still functioning myelin that breaks down in transmitting electrical impulses when the surrounding fluid heats up.
Flexner-Wintersteiner rosette = A feature of retinoblastoma when seen under microscope. It is thought to resemble a flower bud. The same rosette is also seen in pinealoma.