Dr. Niall Crosby

Ophthalmology (Eyes)

Credentials MBChB (Birmingham), FRCOphth (London)
Language English

Dr Crosby graduated from the University of Birmingham, UK with BMedSci (Hons) in Neuroscience (1999) and MBChB (2002), achieving honours in several subjects including ophthalmology. He is a Fellow of the Royal College of Ophthalmologists of London (2011).

He undertook nine years of ophthalmology training in the West Midlands, UK. Dr Crosby then undertook two fellowships in vitreoretinal surgery in the Royal Hallamshire Hospital in Sheffield, UK and at the University of Auckland, New Zealand, both centres of excellence for ophthalmology. He followed this with a third fellowship in medical retina and uveitis at Moorfields Eye Hospital, London, the oldest eye hospital in the world and the largest in Europe. Before relocating to Singapore, Dr Crosby worked as a Consultant vitreoretinal surgeon in the UK National Health Service (NHS).

Dr Crosby was previously an Associate Consultant for three years at Ng Teng Fong General Hospital and Jurong Medical Centre. For two and a half years, he was the only full-time fellowship-trained retinal specialist in the hospital, and during this time he was on-call daily for out-of-hours and emergency retinal problems and trained a team of three Consultants and Associate Consultants in retinal surgery.

Associated Treatments

Dr Crosby sees patients with all ophthalmic problems. He has a particular interest in and training in eye problems involving the retina, and is able to treat these by means of surgery, laser or eye drops. He also has an interest in uveitis (eye inflammation), as well as dry eyes and blepharitis, and the management of myopia in adults and children.

Special Treatments

• Routine and complex cataract surgery: computer-assisted cataract surgery, combined cataract and retinal surgery, premium intraocular lenses for correction of presbyopia and astigmatism
• Surgical retina: surgery for retinal detachment, macular hole, epiretinal membrane, advanced diabetic eye disease, endophthalmitis and ocular trauma
• Medical retina: all areas of medical retina including macular degeneration, diabetic eye disease, vein occlusion and genetic retinal disease. Dr Crosby also performs Photodynamic Therapy (PDT) for central serous retinopathy (CSR) and polypoidal choroidal vasculopathy (PCV)
• Uveitis and inflammatory eye disease: investigation and treatment with topical therapy (eye drops), periocular and intraocular medications, surgery, oral immunosuppressant drugs.



1. Crosby NJ, Westcott M, Michael E, Cunningham WJ, Welch S, Polkinghorne PJ.
Comparative outcomes of primary vitrectomy versus tap and inject for endophthalmitis
following phacoemulsification cataract surgery. Ocular Immunology and Inflammation.
2020; 15:1-7.

2. Crosby NJ, Kim B, McGhee C, Welch S, Riley A, Polkinghorne PJ. Mortality after
endophthalmitis following contemporary phacoemulsification cataract surgery. Clin Exp
Ophthalmol. 2018; 46:903-907.

3. Cunningham WJ, Michael E, Welch S, Crosby NJ, Host BKJ, Polkinghorne PJ. The
Auckland Endophthalmitis Study: The incidence and management of endophthalmitis
following intravitreal bevacizumab. Journal of Vitreoretinal Diseases. 2017; 1:175-180.

4. Crosby NJ, Pedersen K, Price NJ. Anaesthesia in patients undergoing vitreoretinal
surgery. Ophthalmic Anaesthesia 2015; 2:5-8.

5. Mushtaq B, Crosby NJ, Dimopoulos A, Lip P, Stavrou Y, El-Sherbiny S, Yang YC. Effect
of initial retinal thickness on outcome of intravitreal bevacizumab therapy for diabetic
macular edema. Clinical Ophthalmology 2014; 8:807-812.

6. Crosby NJ, Shepherd D, Murray A. Mechanical testing of lid speculae and relationship to
post-operative ptosis. Eye 2013; 27:1098-1101.

7. Crosby NJ, McDonnell P, Shah P. Iridoschisis associated with nanophthalmos and
bullous keratopathy. International Ophthalmology 2013; 33:83-85.

8. Crosby NJ, Shah P. Don’t forget the herbal remedies. Ophthalmic Anaesthesia 2013; 1:

9. Makhzoum O, Crosby NJ, Hero M. Secondary angle closure glaucoma due to late onset
360 degree posterior synechiae following phaco-vitrectomy. International Ophthalmology
2011; 31:481-482.

10. Williams TA, Crosby NJ, Sii F, Chiang M, Lockwood A, Shah P. Long term outcome of
bleb needling revisions following mitomycin C trabeculectomy in Afro-Caribbean eyes.
Acta Ophthalmologica Scandinavica 2007,85:s240:0.

11. Crosby NJ, Gillow T. Response to Jones et al. Eye 2007; 21(5):676.

12. Crosby NJ, Ramaker C, Deane KHO, Clarke CE. Amantadine for dyskinesia in
Parkinson’s disease (Cochrane Review). The Cochrane Database of Systematic Reviews,
2003, Issue 2.

13. Crosby NJ, Deane KHO, Clarke CE. Amantadine in Parkinson’s disease (Cochrane
Review). The Cochrane Database of Systematic Reviews, 2003, Issue 1.

14. Crosby NJ, Deane KHO, Clarke CE. Beta-blocker therapy for tremor in Parkinson’s
disease (Cochrane Review). The Cochrane Database of Systematic Reviews, 2003, Issue

1. Crosby NJ, Thomas A, Hero M. “Minerva” Case Report. British Medical Journal 2010;

1. Crosby NJ. Views from the College: Skills in Retinal Imaging, Diagnosis and Therapy
Seminar. Eye News 2012. Volume 19(3): 58.

2. Crosby NJ, Bowyer J, Jordan TL. Tips on Letter Dictation. Eye News 2006; Volume
13(2): 18-22.

1. Crosby NJ, Shah P. Foundations of Ophthalmic Microsurgery: Principles for Elite
Performance. Volume 1: Systemic Issues. Resonance Publishing Ltd., 2022.


Dr Crosby brings with him experience of having worked in 15 different eye departments. He has mentored and trained several surgeons in retinal and cataract surgery and is actively involved in research, having authored numerous publications and delivered lectures to other eye specialists both within Singapore and abroad. He also participates as a peer-reviewer for international scientific journals. He was previously nominated to the Clinical Faculty Scheme at Yong Loo Lin School of Medicine, National University of Singapore teaching ophthalmology to medical students, and also devised and instigated the ophthalmology module of the Physician’s Assistant Degree Course at the University of Birmingham Medical School, teaching ophthalmology to five academic year groups.

His specialist areas of research are focused around the medical and surgical management of retinal disease, in particular on retinal imaging technology, diabetic retinopathy, retinal detachments and the surgical management of endophthalmitis. He is also working with the Birmingham Institute for Glaucoma Research on optimising patient safety in ophthalmic surgery, ophthalmic anaesthesia and elite performance in ophthalmic surgery. He has recently co-authored his first book, ‘Foundations of Intraocular Microsurgery: Principles for Elite Performance’ which deals with the foundational skills to make ophthalmic microsurgery safe.

Awards and Honours

Dr Crosby has received honours and awards throughout his career, including a competitive scholarship at medical school and a Merit Award from NUHS for increasing the safety and efficiency of cataract surgery. He has volunteered with the ORBIS International Flying Eye Hospital programme in India helping to train local surgeons, and led the Diabetic Retinal Photography screening during the World Diabetes Day event in Singapore in 2019.

Fellowships and Accreditations

– Fellowship of the Royal College of Ophthalmologists, London (FRCOphth), 2012
– Certificate of Completion of Training (CCT), UK, 2014
– Vitreoretinal Fellowship (2014-2015), Royal Hallamshire Hospital, Sheffield, UK
– Clinical-academic Vitreoretinal Fellowship (2015-2016), University of Auckland, New Zealand
– Medical Retina and Uveitis Fellowship (2016-2017), Moorfields Eye Hospital, London, UK