J.G. Lawrenson, PhD

Dr. Lawrenson, who is a professor of optometry, Applied Vision Research Centre, Department of Optometry and Visual Science, City University, London.


Patients taking digoxin may develop color blindness

London-Routine testing for color vision deficiency is not a reliable method to detect digoxin toxicity in patients taking the drug for heart failure or other cardiac problems, said J.G. Lawrenson, PhD.