Authors: Ravilla D Ravindran; Praveen Vashist; Sanjeev K Gupta; Ian S Young; Giovanni Maraini; Monica Camparini; R Jayanthi; Neena John; Kathryn E Fitzpatrick; Usha Chakravarthy; Thulasiraj D Ravilla; Astrid E Fletcher Journal: Ophthalmology Date: 2011-06-25 Impact factor: 12.079