Ranjit Sandhu is a keen researcher looking at innovative methods and techniques to achieve the best results. She has been a co-investigator for international as well as national trials including a randomised controlled clinical trial comparing multifocal, accommodative and monofocal intraocular lenses for small incision sutureless cataract surgery. She has also been a sub-investigator for the international GENEVA Study Group for the use of Ozurdex implant for central and branch retinal vein occlusions. She continually evaluates emerging, evidence based novel treatment therapies, aspiring to achieve the best for her patients.

She has presented at both national and international conferences and published in peer reviewed journals which includes work from her post doctorate thesis. She has co-authored a chapter on Ocular Disease in an Optometry textbook. She has actively lectured medical students and optometrists and continues to write articles and current updates.