After obtaining informed consent the subjects medical information such as medical history will be collected in the case record forms. subjects MRI studies ( performed as standard of care) will be analyzed with a special software to determine the extent and volume of the most recent infarction. The degree of previous white matter damage and any incidental previous strokes will be recorded. MRI brain is a routine imaging technique in the care of stroke patients. Corneal confocal microscopy (CCM) imaging will be ordered for subjects whose standard of care attending physicians havent ordered for them. Some Stroke patients at HGH are ordered CCM if considered necessary by their physician. For the purpose of the study, the investigators would like to order CCM for all the subjects. CCM can be perfomed at anytime within the first month of recruitment into the study so the investigators will have it scheduled as it is convenient to the subjects within the month. The investigators hypothesize that corneal nerve loss may be driven by the same common vascular risk factors which may lead to stroke and thereby provide a surrogate for cerebral neuronal loss and hence pre-stroke 'neuronal reserve'. Hence CCM may allow us to identify the extent of risk factor burden. Furthermore, the quantification of corneal nerves may allow the identification of those with a lower pre-stroke neuronal reserve, and hence may suffer worse neurological outcomes following a stroke.