01. Sheedy, J. E., Hayes J., Engle J., Is all asthenopia the same?, Optometry and Vision Science, 2003, Vol. 80, No. 11, pp. 732 – 739;

01. Sheedy, J. E., Hayes J., Engle J., Is all asthenopia the same?, Optometry and Vision Science, 2003, Vol. 80, No. 11, pp. 732 – 739;