• Monday - Thursday: 9.00 am - 6.00 pm

Who we are


We are a clinical trial organisation grown from more than 20 years in optometry and specialist fields within Mark Hinds optometry and collaboration with ophthalmology our portfolio brings a wealth of knowledge and experience. The ever-growing database of more than 13 000 patients over many years of professional networking sees patients referred from a broad range of age, ethnic, genetic and lifestyle backgrounds from which to source participants. Our collaboration with both private and public ophthalmology facilitates the opportunity to delve into their extensive resources and patient base. Our drive to conduct trials for targeted research to save sight and bring a change to quality of life for many is our passion and focus.



After close to a decade working in both Retail and Wholesale Financial Markets including roles in Risk Management Tracey left finance to establish a family optometry practice with her husband Mark.

Tracey’s drive and competitive edge is evidenced by the successful practice she has helped to develop. As Practice Manager of Mark Hinds Optometrists, Tracey has ensued success by creating, adapting and implementing business models in an everchanging landscape.

In addition to her role with Mark Hinds Optometrists, Tracey has overseen the Australian distribution and accounts for an international innovative contact lens company. Her years of experience in management, finance, logistics and communications has driven Tracey to create Ophthalmic Trials Australia together with her husband Mark.

Tracey has used her knowledge and proficiency in both risk management and healthcare management to incorporate clinical trials into their practice. Co-ordinating participants, managing trial budgets, maintaining research governance, data collection and demonstrating high ethical disciplines are only a small part of what it takes to successfully run ongoing clinical trials. Tracey plays a critical and key role in the successful execution of many clinical trials within Ophthalmic Trials Australia.

Tracey is a competitive perfectionist. Is this due to her lifetime of competitive sports played at all levels. Or simply her fun warm personality that wishes to channel her care for her patients well-being with the potential of further improving their clinical outcomes by offering clinical trials through this arm of our ever evolving and growing company.


Natalie is one of our nursing additions to the Mark Hinds team as an Ophthalmic assistant. She had  been searching for an avenue to put her Nursing degree back to work when the role came up as Clinical Nurse coordinator for the Ophthalmic trials…and never looked back!

Natalie’s experience as an Intensive Care nurse is evidenced by her enjoying the more technical aspects of the Ophthalmic role where her task-focused and meticulous approach can be expressed. 

Natalie has a vast array of interests and qualifications ranging from travel to counselling to interior design. Her fulfilment comes from helping others and joy from witnessing improved outcomes in all aspects of patient care. 

Most fun is had whilst exploring the globe and biggest accomplishment to date is raising her teenage daughters! 


Georgia has been working at Mark Hinds for a number of years, not only through her senior school years but also during her Biomedical Science Degree leading into her Medical Degree in 2022.

Georgia is the most experienced Ophthalmic assistant to date. Her quiet yet confident demeanour has seen her assist and manage many aspects of the business. Exciting roles included Clinical Trial coordinator and unblinded Pharmacist for the clinical trials arm of our company.

Coming from an extended  medical family, Georgia herself is drawn to medicine and waiting be accepted into a Medical program to pursue her dream of becoming a paediatrician.

During her senior years in high school Georgia was awarded leadership roles which she managed to fully immerse and excel in whilst still achieving academic excellence.

On meeting Georgia, it’s no surprise to learn that she is known as the calm and easy going one in her family of four siblings. Her warm smile says it all! Down time between her work commitments at Mark Hinds Optometrists means some relaxed reading and hiking.

Luisa Holguin Colorado

PhD, BAppSc(optom), FAAO

Dr Colorado graduated with a five-year optometry degree in Colombia and worked as a clinical optometrist in ophthalmology clinical and surgical practices for two years before coming to Australia.

She embarked on a PhD in 2013 supervised by Emeritus Professor Nathan Efron AC.

She completed a research fellowship at the Contact Lens and Visual Optics Laboratory and The Anterior Eye Laboratory at the Queensland University of Technology, conducting research work for the contact lens industry, such as Johnson & Johnson Vision Care and CooperVision.

She is currently involved in numerous clinical trials as Principal Investigator, Sub-Investigator, Clinical Coordinator and Ethics consultant for Brisbane Sites undertaking trials with recognized ocular pharma worldwide. She brings this wealth on knowledge and experience onboard to Ophthalmic Trials Australia.


Sarah was a patient at Mark Hinds Optometrists when she was recruited to work at the practice.
Sarah had just completed her Bachelor of Science degree and was working on clinical trials at the Royal Brisbane Hospital. Given her scientific knowledge and research experience, Sarah came on board to assist with the data entry and coordinating for the recent clinical trials run at the practice.
Sarah still works as a part-time Ophthalmic assistant at the practice whilst studying a Medical Degree at the University of Queensland. Sarah hopes to one day work with the Royal Flying Doctor Service or Doctors without Borders to aide those who have limited access to medical care.
Sarah had the prestigious role of being School Captain at Brisbane Girls Grammar and played soccer in the National Premier League in Queensland. Given her current busy schedule all she has time for now is touch football and netball to stay social and fit.


Ava is our latest study coordinator recruit. She facilitates logistics at front of practice and has completed of a Diploma in Business in 2021.

With already acquired leadership  and organisational skills and work ethic consistent with the standards within the Mark Hinds practice, Ava will graduate from a casual to a full time employee at the end of 2021.

Ava’s self motivation, bright personality, insight into business operations and her proven organisational, communication, customer service and leadership skills make her a valued member of the Ophthalmic Trials Australia team.


Ashley has been an Ophthalmic assistant at Mark Hinds Optometrists since 2017 whilst completing high school and most recently whilst studying a Bachelor of Law and Business. Ashley took on the role of unblinded Pharmacist during several recent clinical trials undertaken at the practice.

Ashley is a multitalented individual and wears a creative hat as an events co-ordinator at a well known wedding venue -when time allows.

Ashley was Artistic Gymnastics Captain at Brisbane Girls Grammar School, her love and knowledge of the sport led her to coaching other young aspiring gymnasts.
Ashley has a love for speech and drama, yet for all her bold achievements and interests her most humbling moments are those experienced  by working with underprivileged children in India.