Australian ophthalmologists rarely publish their surgical outcome data publicly. This is understandable given the complexity of risk adjustment and the medico-legal environment, but it means that patients evaluating cataract surgery options in Melbourne have limited objective information beyond credentials and volume. In the interests of transparency and to provide patients and referring clinicians with meaningful outcome information, I am publishing the results of a five-year audit of cataract surgery complications in my practice. This audit examined all cataract surgery performed between January 2021 and December 2025, focusing on two primary endpoints: posterior capsule rupture (PCR) requiring anterior vitrectomy, and vitreous loss. The results are presented with published international benchmarks for context and with an explicit discussion of the limitations of this type of audit.
What is posterior capsule rupture and why does it matter?
The posterior capsule is the thin membrane at the back of the lens capsular bag that supports the intraocular lens implant after cataract surgery. Posterior capsule rupture (PCR) occurs when this membrane is inadvertently torn during the phacoemulsification procedure. When PCR occurs and is associated with vitreous prolapse into the anterior segment, an anterior vitrectomy is required to remove vitreous gel from the anterior chamber before the intraocular lens can be safely implanted or repositioned.
PCR is recognised as the most important modifiable intraoperative complication of cataract surgery. It is associated with a significantly increased risk of subsequent complications including cystoid macular oedema, retinal detachment, raised intraocular pressure, and in severe cases, endophthalmitis. The Royal College of Ophthalmologists' National Ophthalmology Database identifies PCR as the key quality metric for cataract surgery because it is the most important modifiable risk factor for visual loss following the procedure.
PCR is not always avoidable. Certain patient and ocular factors increase the risk substantially, including pseudoexfoliation syndrome (odds ratio 3.47), dense or mature cataracts (odds ratio 2.41), previous vitrectomy, high myopia, shallow anterior chamber, and the inability to lie flat or cooperate during surgery. A surgeon who performs a high proportion of complex cases will have a higher expected PCR rate than one performing only routine cases, which is why risk adjustment is important when interpreting audit data. For an overview of how surgical volume and cataract surgery outcomes relate in the published literature, see the dedicated analysis.
The audit: methodology and case population
This audit examined all cataract surgery performed in my practice between 1 January 2021 and 31 December 2025, a five-year period. The audit was conducted by reviewing operative records for two specific endpoints.
First, any case in which anterior vitrectomy was performed, which is the clinical indicator of significant posterior capsule rupture with vitreous loss.
Second, any case in which the intraocular lens was placed in the sulcus rather than in the capsular bag, which is the management strategy used when in-bag placement is not achievable due to an anterior or posterior capsular complication.
The audit was a retrospective review of operative records from my surgical practice at Northpark Private Hospital, Bundoora. It was not a prospective registered clinical trial and did not involve formal statistical analysis. The audit captures my personal surgical outcomes only and does not include cases performed by colleagues at the same institution.
The audit covered a total of 2,059 cataract surgery procedures performed personally by Dr Ross MacIntyre at Northpark Private Hospital, Bundoora, between 1 January 2021 and 31 December 2025. It should be noted that surgical volumes in 2021 and 2022 were substantially reduced compared with preceding and subsequent years due to COVID-19 related restrictions on elective surgery in Victoria. The five-year case total therefore underrepresents the typical annual surgical volume in this practice. Over the three years from 2023 to 2025, annual case volumes returned to pre-pandemic levels consistent with a high-volume subspecialist cataract practice.
The case mix included routine cataract surgery as well as complex cataract surgery, including eyes with pseudoexfoliation syndrome, previous corneal refractive surgery, posterior polar cataracts, dense and mature cataracts, and combined cataract and corneal transplant procedures. The inclusion of complex cases in the audit population is relevant to the interpretation of the results.
Audit results
Over 2,059 cataract surgery procedures performed during the five-year audit period, the following results were identified:
Posterior capsule rupture requiring anterior vitrectomy: zero cases identified in 2,059 procedures.
Vitreous loss: zero cases identified in 2,059 procedures.
Sulcus IOL placement due to capsular complication: two cases in 2,059 procedures (0.097%). Both cases involved anterior capsular runout with intact posterior capsule, managed successfully with sulcus IOL placement and optic capture, achieving good visual outcomes. Neither case required anterior vitrectomy and neither was associated with vitreous loss.
Context: published international benchmarks
To contextualise these audit results, the most relevant published benchmark is the UK Royal College of Ophthalmologists' National Ophthalmology Database (NOD) Audit, the largest prospective cataract surgery audit in the world.
The most recent NOD Annual Report, covering cataract surgery performed between 1 April 2022 and 31 March 2023, reported a national unadjusted PCR rate of 0.87 percent, described as less than one in a hundred patients experiencing posterior capsule rupture. This represents a continuing year-on-year reduction from prior years and reflects improving outcomes across the NHS cataract surgery programme.
A 2024 analysis published in Eye, the journal of the Royal College of Ophthalmologists, analysed 961,208 cataract operations from 136 centres performed by 3,198 surgeons between 2016 and 2022. This study identified a PCR rate of 1.01 percent across the entire dataset including all surgeon grades. The analysis confirmed that less experienced trainee surgeons had a PCR rate 3.75 times higher than experienced consultants, demonstrating the strong inverse relationship between surgical experience and complication rate (Sim et al., Eye 2024;38:3495-3503).
High-volume subspecialist surgeons operating in elective private practice, managing selected patient populations with routine and moderately complex cataracts, consistently achieve PCR rates at the lower end of the published range. Published rates for experienced high-volume consultants in elective practice typically fall in the range of 0.3 to 0.8 percent.
The zero PCR rate and zero vitreous loss rate identified in this audit over five years is presented in the context of these published benchmarks. It is not presented as a comparison to any individual surgeon or practice.
Surgical techniques that reduce complication risk
Achieving low complication rates in cataract surgery requires both technical training and systematic pre-operative risk assessment. Several specific techniques and protocols have contributed to my practice outcomes.
Pre-operative risk stratification: Every patient undergoes assessment for known PCR risk factors before surgery including pseudoexfoliation, posterior polar cataract morphology, axial length, anterior chamber depth, and pupil dilation adequacy. This assessment informs the surgical plan and the level of adjunctive measures required.
Pupil management: Inadequate pupil dilation is a significant risk factor for anterior capsular and posterior capsular complications. I use intracameral phenylephrine and ketorolac (Omidria) routinely in cases with borderline dilation and iris hooks or Malyugin ring devices in cases with pharmacologically resistant small pupils, including patients on alpha-blockers such as tamsulosin.
Capsule staining: Trypan blue dye is used routinely in cases with poor red reflex, dense cataracts, or white cataracts where visualisation of the anterior capsule is reduced. This significantly improves the safety of the continuous curvilinear capsulorhexis in these cases.
Phacoemulsification parameters: Low-flow, low-vacuum phacoemulsification settings are used in cases at elevated risk of posterior capsular complications, including posterior polar cataracts and cases with suspected zonular weakness. Reducing ultrasound energy and fluidics in these cases reduces the mechanical forces on the posterior capsule during nucleus removal.
Capsular tension rings: Capsular tension rings are used in cases with documented zonular weakness including pseudoexfoliation syndrome and previous trauma, providing equatorial support to the capsular bag throughout the procedure and during lens implantation.
Intraoperative assessment: Throughout the procedure, anterior chamber stability and lens behaviour are monitored closely for early signs of zonular laxity or posterior capsular stress. Recognising these signs early and adjusting technique accordingly is an important risk mitigation strategy.
Limitations of this audit
This audit has several important limitations that must be understood when interpreting the results.
This is a retrospective single-surgeon audit, not a prospective registered clinical trial. It was not subject to independent verification or peer review of the methodology.
The total case volume and case mix are not published in this audit. Without a precisely defined denominator and risk-adjusted analysis, the PCR rate cannot be expressed as a percentage and direct statistical comparison with published benchmarks is not appropriate.
The audit period of five years represents a specific window of time in a practice that has been operating for over 20 years. It does not capture the complete surgical career.
The results of this audit reflect outcomes over a defined historical period. They do not constitute a guarantee or prediction of outcomes for any individual patient. Posterior capsule rupture is a recognised risk of all cataract surgery regardless of surgeon experience or volume. Every patient undergoing cataract surgery should be consented for this risk as part of the pre-operative process.
Individual outcomes vary based on patient-specific and ocular factors that are independent of surgical technique. Patients with known risk factors for PCR including pseudoexfoliation, dense cataracts, previous vitrectomy, or poor cooperation may have a higher individual risk profile regardless of the surgeon's overall complication rate.
This audit does not capture all possible cataract surgery complications. It is limited to the two endpoints specified: anterior vitrectomy and sulcus IOL placement. Other intraoperative and postoperative complications are not reported here.
What this means for patients considering cataract surgery
Posterior capsule rupture and vitreous loss are the most feared intraoperative complications of cataract surgery from a patient perspective because of their association with poorer visual outcomes. Understanding a surgeon's experience with managing these complications, and the steps they take to minimise risk, is a reasonable part of evaluating a cataract surgeon.
This audit provides one data point in that evaluation. It should be considered alongside other relevant factors including the surgeon's overall training and credentials, their experience with cases similar to your own, their approach to pre-operative risk assessment, and the quality of their pre-operative counselling about realistic expectations. For guidance on how to evaluate a cataract surgeon, including questions to ask at your consultation, see the patient guide at corneaeyedoctor.com.
If you have known risk factors for cataract surgery complications including pseudoexfoliation, a history of previous eye surgery, or a very dense cataract, I encourage you to discuss these specifically at your consultation. Understanding your individual risk profile is more meaningful than any population-level audit result. For information on what to expect at your cataract surgery consultation, including what measurements are taken and what questions to bring, see the dedicated guide.
References
- Sim PY, Donachie PHJ, Day AC, Buchan JC. The Royal College of Ophthalmologists' National Ophthalmology Database study of cataract surgery: Report 17, a risk factor model for posterior capsule rupture. Eye (Lond). 2024;38(18):3495-3503. https://pubmed.ncbi.nlm.nih.gov/39294232/
- Royal College of Ophthalmologists National Ophthalmology Database Audit. Key Findings and Annual Report on cataract surgery performed in England, Wales and Guernsey, 01 April 2022 to 31 March 2023. https://nodaudit.org.uk/publications
- Johnston RL, et al. The Cataract National Dataset Electronic Multi-centre Audit of 55,567 Operations: variation in posterior capsule rupture rates between surgeons. Eye. 2009. https://www.nature.com/articles/eye2009195
Dr Ross MacIntyre BA (Chemistry) MD FRANZCO is a subspecialist cataract, corneal, and refractive surgeon practising in Melbourne. He completed subspecialty fellowship training in cornea, complex cataract, and refractive surgery at the Wilmer Eye Institute, Johns Hopkins University, and holds a staff specialist appointment at the Royal Victorian Eye and Ear Hospital Cornea Unit. He has personally performed over 7,000 cataract surgeries performed over more than 20 years using phacoemulsification technique since 2007 and is a RANZCO RACE Examiner since 2019, serving as Examiner in Chief for the Melbourne Clinical Examination.