Dr Zena Lim embarked on her medical training with the National University of Singapore in 1995, followed by residency training in Ophthalmology at the Singapore National Eye Centre. This subsequently led to Fellowship accreditation in Ophthalmology by the Royal College of Surgeons of Edinburgh, UK. She graduated top of her cohort in 2004, with the "Gold Medal in Ophthalmology" award in the Master of Medicine (Ophthalmology) examinations.

In 2004-2005, she trained under the tutelage of Prof Alex Levin, at the renowned Hospital for Sick Children, Toronto, Canada. Upon completion of fellowship training in Paediatric Ophthalmology and Strabismus with the Singapore National Eye Centre, she was awarded the Health Manpower Development Plan scholarship by the Ministry of Health to further hone her clinical skills at the Duke University Eye Centre, USA. There, she worked alongside Professors Edward Buckley and Sharon Freedman, international leaders in Ophthalmology.

Dr Zena Lim has presented and lectured at numerous international, regional and local conferences, and she is first author of many peer-reviewed indexed medical journals. In 2010, she was awarded "Best of the Anterior Segment Specialty Meetings" at the American Academy of Ophthalmology Meeting in 2010 for her research in childhood cataract.

She was previously a consultant with the Cataract and Comprehensive Service and the Paediatric Ophthalmology and Strabismus Service at the Singapore National Eye Centre.

Besides her passion for clinical practice, Dr Zena Lim believes in the importance of training the next generation of ophthalmologists. As a Core Faculty member of the Ophthalmology Residency Program at the Singapore National Eye Centre, she was actively involved in curriculum planning, residency teaching and cataract surgery training. She also served as an Adjunct Assistant Professor at the Duke-NUS Graduate Medical School and was part of the Clinical Faculty Scheme at the Yong Loo Lin School of Medicine, Singapore. She is currently Visiting Consultant at the Singapore National Eye Centre, KK Women's and Children's Hospital and Tan Tock Seng Hospital where her main role is imparting clinical and surgical skills to young aspiring ophthalmologists.

Dr. Loh attended the Yong Loo Lin School of Medicine in National University of Singapore (NUS) and graduated with the M.B,B.S degree. In her year of internship, she was awarded the “Best Houseman Award”. She was selected for training in the inaugural batch of ophthalmology residents in the Singapore National Eye Centre (SNEC). After completion of her training, she went on to complete the “Leading Innovations in Healthcare and Education” course at the Harvard Macy Institute in Boston. In 2013, she obtained the Young Ophthalmologist Award for best platform presentation at the American Association for Paediatric Ophthalmology and Strabismus Meeting for her work on myopia.

As one of the key ophthalmologists establishing the presence of the Myopia Centre (SNEC), she championed for greater collaboration between eye specialists and optometrists. She gained extensive experience treating children with atropine eye drops, myopia control glasses and myopia control contact lenses. She co-created the SNEC myopia course that garnered positive feedback from learners, as well as winning multiple awards both locally and internationally. She has also published several peer-reviewed papers on clinical myopia control and has been invited to speak at international and local scientific conferences.

She was part of the clinical faculty at both NUS and the Duke-NUS Graduate Medical School. Through her commitment to improve healthcare staff wellbeing, she spearheaded many initiatives in her tenure as the Institution Wellness Officer of SNEC, benefitting staff across all departments. She is currently a Visiting Consultant at SNEC.

She recognises the importance of a holistic approach to clinical management based on each patient’s condition and lifestyle needs. For myopia control patients, she aims to achieve optimal results by customising treatment and draws on both her extensive clinical experience as well as her own personal parenting experience.