Posterior capsular rupture during cataract surgery
The most common intraoperative complication of cataract surgery. When recognised and managed promptly, it remains compatible with an excellent visual recovery. Dr Gozlan explains everything.
What is posterior capsular rupture?
Posterior capsular rupture is the most common and most feared intraoperative complication of cataract surgery. It is a tear in the posterior capsule, the thin transparent membrane that surrounds the lens and supports the intraocular lens. Occurring in roughly 1 to 2% of procedures, posterior capsular rupture changes the course of the operation but remains, in experienced hands, entirely manageable with excellent visual outcomes.
An essential but fragile membrane
The posterior capsule is only 4 microns thick — one of the thinnest membranes in the human body. It holds the implant in place and separates the front of the eye from the vitreous gel behind it. A tear connects these two compartments.
A recognised and anticipated complication
Posterior capsular rupture is one of the known risks of any cataract surgery. Dr Gozlan anticipates it through the pre-operative assessment and manages it without delay when it occurs.
When does posterior capsular rupture occur?
Posterior capsular rupture can happen at different stages of phacoemulsification, the modern technique for removing a cataract:
During nucleus fragmentation
This is the highest-risk moment: ultrasound and manoeuvres on a hard nucleus can stress the posterior capsule to the point of tearing it.
During cortex aspiration
Cleaning the residual lens material in direct contact with the capsule is a second delicate phase of the operation.
During implant insertion
Less often, inserting the intraocular lens into the capsular bag can weaken the posterior capsule if it is already compromised.
Risk factors for posterior capsular rupture
Some eyes carry a higher risk of posterior capsular rupture. Identifying them during the pre-operative assessment allows the surgical strategy to be adapted.
Pseudoexfoliation
This deposit of material weakens the zonules (the fibres that suspend the lens) and makes the capsule more vulnerable during surgery.
Dense or brunescent cataract
A very hard nucleus requires more ultrasound energy, increasing the stress placed on the posterior capsule.
Posterior polar cataract
This particular form is sometimes adherent to the posterior capsule, which may have a congenital area of weakness.
Small pupil / floppy iris
Poor dilation or floppy iris syndrome reduces visibility and control of the surgical manoeuvres.
High myopia
Long, myopic eyes have a deep chamber and a more fragile capsule, increasing the risk of posterior capsular rupture.
Previous vitrectomy
An eye already operated on the retina provides different vitreous support, which can change how the capsule behaves.
⚠️ None of these factors contraindicates cataract surgery. They simply prompt the surgeon to be more vigilant and to take appropriate preventive measures to limit the risk of posterior capsular rupture.
What happens in the event of posterior capsular rupture?
When posterior capsular rupture occurs, the barrier between the front of the eye and the vitreous gel is no longer intact. Two main phenomena may then arise:
Vitreous prolapse
The vitreous gel can move forward into the front of the eye. It must be removed carefully to avoid any later traction on the retina.
Dropped fragments
Lens fragments can fall into the vitreous cavity. A complementary vitreoretinal procedure is sometimes needed to remove them.
This is why posterior capsular rupture calls for immediate and careful management: recognised early, it is fully controllable and does not compromise the final result.
How the surgeon manages posterior capsular rupture
Managing posterior capsular rupture relies on codified steps, performed calmly as soon as the tear is identified:
Stabilise the anterior chamber
The surgeon injects a viscous substance (viscoelastic) to maintain pressure, push back the vitreous and prevent the tear from enlarging.
Perform an anterior vitrectomy
If vitreous is present in the anterior chamber, an anterior vitrectomy removes this gel in a controlled way. This is the key step in managing posterior capsular rupture, as it prevents retinal traction.
Remove the residual material
The remaining lens fragments are aspirated carefully, without placing any additional stress on the capsule.
Where is the lens implanted after posterior capsular rupture?
Posterior capsular rupture does not mean the implant has to be abandoned. In the vast majority of cases, an intraocular lens is placed during the same operation; only its position changes according to the remaining capsular support.
| Capsular support | Lens position | Situation |
|---|---|---|
| Intact anterior capsule | Lens in the sulcus | Most common |
| Insufficient support | Iris or scleral fixation | Sometimes a second stage |
| Minimal tear | Lens in the capsular bag | Possible if stable |
The surgeon favours a large-optic implant, which is more stable when capsular support is reduced after posterior capsular rupture.
Visual prognosis and recovery after posterior capsular rupture
The key message is reassuring: when managed correctly, posterior capsular rupture is compatible with excellent final vision. More than 90% of patients achieve a good visual outcome after appropriate management.
A sometimes more gradual recovery
The eye may show transient inflammation or corneal oedema. Anti-inflammatory treatment is prolonged and the post-operative check-ups are more frequent.
Monitoring the retina
Posterior capsular rupture slightly increases the risk of retinal detachment and macular oedema. A dilated fundus examination is performed to confirm all is well.
Frequently asked questions
Posterior capsular rupture is the most common intraoperative complication of cataract surgery, but it is rarely serious when recognised and managed immediately. Once an anterior vitrectomy has been performed and the lens correctly positioned, the vast majority of patients recover good vision. The risk of late complications (retinal detachment, macular oedema) remains low but calls for close follow-up.
In most cases the intraocular lens can still be placed during the same operation, no longer in the capsular bag but in the sulcus (just in front of the capsule). If capsular support is insufficient, the lens can be fixated to the iris or the sclera, sometimes as a second procedure.
The risk cannot be eliminated entirely, but a thorough pre-operative assessment identifies at-risk eyes (pseudoexfoliation, small pupil, dense or posterior polar cataract, high myopia, previous vitrectomy) and allows the surgical technique to be adapted. This is the best way to reduce its frequency.
Visual recovery may be a little more gradual than after uncomplicated surgery, sometimes with transient inflammation or corneal oedema. Anti-inflammatory treatment is prolonged and check-ups are more frequent. Most patients nonetheless regain satisfactory vision within a few weeks.
References & medical sources
- Société Française d'Ophtalmologie (SFO). Chirurgie de la cataracte — Rapport SFO. Paris: Elsevier Masson; 2019.
- Chan E, Mahroo OAR, Spalton DJ. Complications of cataract surgery. Clin Exp Optom. 2010;93(6):379–389. doi:10.1111/j.1444-0938.2010.00516.x
- Vajpayee RB, Sharma N, Dada T, Gupta V, Kumar A, Dada VK. Management of posterior capsule tears. Surv Ophthalmol. 2001;45(6):473–488.
- Ti SE, Yang YN, Lang SS, Chee SP. A 5-year audit of cataract surgery outcomes after posterior capsule rupture and risk factors affecting visual acuity. Am J Ophthalmol. 2014;157(1):180–185. doi:10.1016/j.ajo.2013.08.022
- Narendran N, Jaycock P, Johnston RL, et al. The Cataract National Dataset electronic multicentre audit of 55 567 operations: risk stratification for posterior capsule rupture and vitreous loss. Eye (Lond). 2009;23(1):31–37. doi:10.1038/sj.eye.6703049
- Haute Autorité de Santé (HAS). Chirurgie de la cataracte de l'adulte — recommandations. Saint-Denis: HAS; 2020.