Dr. Paul Athanasiov

Advanced cataract surgery, pterygium, glaucoma, and cornea surgery.

Medical training:

    • Bachelor of Medicine and Bachelor of Surgery (MBBS; Adelaide University) 
    • Formal training and accreditation in Ophthalmic surgery by the Royal Australian and New Zealand College of Ophthalmology (RANZCO)
    • Further sub-specialist training at the Royal Adelaide Hospital in areas of CorneaGlaucoma and complex cataract surgery.
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Further post-graduate qualifications: 

    • Master of Medicine (Ophthalmic Science) at the University of Sydney
    • Master of Ophthalmology at Adelaide University
    • Research: 12 publications in areas of cataract, oculo-plastic surgery and ocular anesthesia.

Consulting locations: North Adelaide, Kurralta Park, Windsor Gardens, Central Districts, Whyalla, Coober Pedy. 

Operating locations:

 Dr Soo Khai NgSoong

Dr Soo Khai Ng is a comprehensive ophthalmologist with a subspecialist training in glaucoma.

Soo completed medical school at the University of Adelaide and  ophthalmology training in South Australia. He then undertook glaucoma fellowship at the prestigious Oxford Eye Hospital, Oxford UK where he received extensive training in complex cataract surgery, conventional glaucoma surgery and minimally invasive glaucoma surgery (MIGS). 

His scope of work includes cataract, glaucoma, medical retina, pterygium and general ophthalmology. 

Soo is also actively involved in ophthalmic research and has 15 publications in peer reviewed journals. He currently holds the title of Associate Clinical Lecturer with the University of Adelaide.

Consulting locations: North Adelaide, Kurralta Park, Windsor Gardens, Central Districts, Whyalla. 

Operating locations:

Dr. Katja Ullrich

BBioMedSc, BMBS, MMed (Ophthal Sc), FRANZCO, ANZOPSKatja Ullrich

Dr Ullrich is an Australian trained ophthalmologist with subspecialty training in oculoplastic, orbital and lacrimal surgery.

She was born in Germany and went to high school in both Germany and Australia. She gained experience in multiple surgical specialties including plastic surgery, neurosurgery, orthopaedics and burns before focusing exclusively on ophthalmology.

Dr Ullrich completed her ophthalmology training in Adelaide, South Australia, and then obtained further subspecialty training.

Dr Ullrich completed her fellowship in oculoplastic, orbital and lacrimal surgery at the Queen Victoria Hospital in the UK. Dr Ullrich then underwent further training in aesthetic periocular surgery in Beverley Hills, USA; and paediatric oculoplastics at the Children’s Hospital in Philadelphia, USA.

Dr Ullrich has published research in both the general ophthalmology and oculoplastics literature. 

Dr Ullrich specialises in:

    • Oculoplastics, Lacrimal and Orbital Surgery
    • Cosmetic Blepharoplasty and Periocular Surgery
    • Cataract Surgery


Dr Simone Beheregaray


Simone Beheregaray




Dr Simone Beheregaray initially completed her ophthalmology training in Brazil and continued there as a consultant before joining the Wilmer Eye Institute in the USA as a Cornea research fellow. In 2014 she obtained her PhD at the University of Tsukuba, Japan. She completed further sub-speciality training with Fellowships in Glaucoma (Brazil), Cornea (Sydney Eye Hospital), Cataract and Refractive Surgery (Queen Elizabeth Hospital) as well as the Fred Hollows International Fellowship (Lion Outback Vision, WA).

After settling in Australia, she finalised her FRANZCO qualifications and now practices at Eye Surgeons SA whilst continuing at the Royal Adelaide Hospital as an anterior segment consultant. Simone offers comprehensive patient-focussed care in cornea, anterior eye, cataract, glaucoma and general ophthalmology. Away from work, Simone enjoys exercise and yoga.

Consulting and operating locations: North Adelaide, Windsor Gardens, Elizabeth Vale and Whyalla. 


Dr David Sia



Dr David Sia returned in 2020 with dual-fellowship training in Vitreoretinal Surgery and Ocular Oncology.

David obtained his medical degree from the University of Otago, New Zealand in 2009 and went on to undertake ophthalmology registrar training in Adelaide, South Australia and Alice Springs, Northern Territory.

Following completion of registrar training, David then pursued overseas fellowship training and completed a 13-month Ocular Oncology Fellowship in London, UK at the prestigious Moorfields Eye Hospital, St Bartholomew’s Hospital and Royal London Hospital. This was followed by a 2-year Vitreoretinal Fellowship in Edmonton, Canada, at Alberta Retina Consultants. During his fellowships, he gained extensive experience in treating medical and surgical retinal diseases, as well as adult and paediatric intraocular and ocular surface tumours. 

Upon returning to Adelaide, David was appointed as a Vitreoretinal Specialist and Ocular Oncologist at the Royal Adelaide Hospital, Flinders Medical Centre and Women’s and Children’s Hospital where he will be regularly involved in the training of future ophthalmologists and vitreoretinal surgeons. He is actively engaged in clinical research, has published widely and written book chapters. He currently holds a position as Clinical Associate Lecturer at the University of Adelaide.

In his free time, he enjoys photography, travel, reading, seeking out good food and working on computers. Having grown up in a multi-cultural background, he is fluent in English, Malay, Mandarin, Foochow. 

David is a dedicated professional who loves his craft. He is committed to providing the best care possible for his patients and loves to connect with them.

 Dr. Weng Onn Chan


Weng is a Consultant Ophthalmologist and Vitreoretinal Surgeon who returned to Adelaide in 2018 after completing his surgical retinal fellowship at the prestigious Moorfields Eye Hospital, London.

​Weng attended medical school at the University of Otago, New Zealand, graduating in 2008 and winning the undergraduate John Parr Prize of Ophthalmology. After completing his ophthalmology training in South Austalia, he underwent further subspecialist training completing medical and surgical retinal fellowships at the Royal Adelaide Hospital, Adelaide and Vitreoretinal fellowship at Moorfields Eye Hospital, London.

Weng has been actively involved in both clinical and basic science research since 2008. He currently has more than 30 publications in international, peer reviewed ophthalmic journals and has also co-authored several book chapters. He has won numerous research grants and awards and has completed a Masters of Philosophy (Ophthalmology) and a Postgraduate Diploma in Ophthalmic Basic Sciences. Weng is heavily involved in teaching and has won several awards in recognition of his commitment to teaching. 

​Weng grew up in multiracial Malaysia and is fluent in English, Malay, Mandarin, Cantonese and Hokkien. Weng also keen learner of languages and speaks conversational Japanese. Outside medicine, Weng enjoys reading, competitive video gaming and cooking.

Consulting and operating at WindsorGardens Day Surgery, Windsor Gardens

 Rebekah Hopps


BMedSc(VisSc) MOpt Oc Ther

Rebekah is our experienced Clinical Optometrist providing care across all Eye Surgeons SA locations. She graduated from Flinders University as Dux of her year in 2015 with a Master of Optometry and Bachelor of Medical Science (Vision Science) and is endorsed to prescribe topical ocular medication. She worked for a year as a community-based optometrist before joining the practice in February 2017.

Rebekah works closely with Dr Paul Athanasiov and consults with patients pre- and post-operatively to address any concerns, explain their ocular conditions and assist in their long-term management. She prides herself in providing high quality patient-centred care to every patient and is passionate about making sure every patient understands their ocular condition and the process of treatment. When she’s not working, Rebekah spends her leisure time practicing classical ballet at her local dance studio and keeping company with her budgie, Chip.

Rebekah is consulting at North Adelaide, Kurralta Park and Central Districts.


 Daniel Tretola


BMedSc (VisSc) MOpt Oc Ther

Daniel is one of our therapeutically endorsed clinical optometrists providing care across all of our locations. Daniel first started with our practice as an ophthalmic assistant back in 2015. He graduated with a Bachelor of Medical Science (Vision Science) and a Master of Optometry from Flinders University in 2018 having completed parts of his training in New York at the renowned State University of New York Eye Centre.

Daniel works closely with all of our ophthalmologists both in the pre and post-operative setting for our surgical patients as well as helping in the shared care of patients suffering from chronic eye conditions including glaucoma, cataracts and keratoconnus. He has a strong interest in the management and treatment of ocular conditions as well as improving the services available to rural patients. Daniel aims to ensure all his patients leave with a better understand as to the health of their eyes, available management and treatments for any ocular conditions as well as with a smile on their face. He is a keen member of Optometry Australia and the Cornea and Contact Lens Society of SA where he loves to share his experiences and learn from various experts in the field. When not in the consulting room you will find Daniel tending to his garden or at the airport on his way to another adventure.

Appointments with Daniel can be booked at our North Adelaide, Windsor Gardens, Kurralta Park and Whyalla rooms.