Dr Cullen is an ophthalmologist passionate about paediatric eye conditions and adult strabismus. She qualified in 2010 as a specialist and went on to do a further two years of training in advanced microsurgical techniques including non-penetrating glaucoma surgery and paediatric cataracts, while working as an honorary consultant. Dr Cullen has a passion for both children and strabismus and was awarded an international fellowship in paediatric ophthalmology and adult strabismus after a year of highly specialised training at the IWK Children’s Hospital in Canada.

She is a member of both the World Society of Paediatric Ophthalmology and Strabismus and the South African Society of Paediatric Ophthalmology and strabismus , where she serves on the executive committee. She is enthusiastic about giving back to the community as well as teaching, and has been involved in both local and international outreaches throughout her career. Dr Cullen also runs a paediatric eye clinic every Wednesday at the Dr George Mukhari Academic Hospital. She is registered with The Colleges of Medicine of South Africa and strives to provide the best care possible for her patients.