TRAFFIC ADVISORY:

President Trump is scheduled to be in Philadelphia on Tuesday, September 15, 2020 at The National Constitution Center (NCC) in the Independence Mall area. Increased police presence is anticipated in Center City throughout Tuesday afternoon and evening. Please allow extra time if you are going to Wills Eye. Please be advised of area street closures to vehicles beginning at 1:00PM on Tuesday 9/15. Pedestrian access will also be limited in the area. This is subject to change and area restrictions, which could widen, will be lifted once the President departs the NCC. There are also demonstrations planned for Tuesday 9/15 around Independence Mall as well as City Avenue.

Eye Movement Analysis

By using electro-oculograms, where small electrodes are placed on the skin around an infants eyes, eye movements of children under one year of age can be recorded. (This test is not painful or harmful to the child.) Patients are routinely videotaped for further analysis. The general behavior of the child at the time of the test is also assessed. This system has enabled our researchers to describe and document the different types of eye movements in infants — something that no other center had previously been able to do. 

For more accurate recordings of adults and older children, special contact lenses containing fine hairline wires are placed on the eyes and then connected to recording devices. A computer-controlled target is directed onto a screen so that precise areas of the retina can be stimulated, even in randomly moving eyes. The special contact lenses provide horizontal, vertical or torsional recordings with a precision and range not usually available, affording measurements on eyes that cannot accurately track a target.