Results of the scans were calibrated using accepted norms for retinal fiber thickness and then compared to an MRI of each of the patient's brains - also calibrated using accepted norms.

CNN: Can an eye exam detect multiple sclerosis?

Calabresi says his next step will be to look at changes in the fiber layer thickness in 100 patients over a period of three years.

CNN: Can an eye exam detect multiple sclerosis?