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Phacoemulsification with IOL

The most performed operation on earth: the clouded lens is emulsified through a two-millimetre tunnel and a folded acrylic lens unrolls into its place.

Indication: Visually significant cataract; the threshold is the patient's life, not a Snellen line.

Part of Ophthalmic Surgery →4 stages1 complications to knowopen
Cataract surgery under the operating microscope
Wikimedia Commons · Public domain

Stage

1 / 4

Incisions and capsulorhexis

Self-sealing corneal micro-incisions, viscoelastic fills the chamber, then a continuous circular tear is fashioned in the lens's anterior capsule.

Watch for: Errant rhexis tear running to the periphery · Endothelial trauma

The surgeon asks

Why must the capsulorhexis be one continuous curvilinear tear?

Why are we operating?

Phacoemulsification replaces the eye's clouded lens through an incision smaller than three millimetres: ultrasound fragments the cataract inside its own capsular bag, the fragments are aspirated, and a folded intraocular lens unfolds into the emptied bag. It is the world's most performed operation, done awake in minutes, and its decision is functional: surgery when the blur costs the life the patient wants to live.

Pulls toward surgery

Cataract costing valued function (driving, reading, independence)Refractive targets chosen with the patient beforehandSecond-eye surgery completing binocular visionLens removal serving other eye disease (angle closure, retinal views)

Gives the team pause

Expectations unmatched to comorbid retinal or optic nerve diseaseThe pseudoexfoliative or post-trauma eye with weak zonulesAnticoagulation and the one eye that cannot afford any complication

Shared foundations

Operating on a pressurised globe

The eye's operations share constraints no other field has: a working space measured in millimetres, tissue that must stay transparent, and a globe whose pressure is both tool and threat. Taught once here; the cataract and globe-repair pages assume it.

Understand it once, in the specialty hub

What the surgeon is thinking

  • Incisions and capsulorhexis

    Why is the capsulorhexis the operation's foundation?

    The continuous curvilinear tear in the anterior capsule creates a smooth-edged round window into the bag: continuous edges resist radial extension under the surgery's forces, and the intact rim later shelves the implant in place. A rhexis that runs peripherally converts a routine case into a complication pathway, which is why it is finished carefully before anything else happens.

  • Emulsifying the nucleus

    What is the ultrasound actually doing, and what is being protected?

    The needle emulsifies nuclear fragments (divide-and-conquer or chop patterns) while irrigation-aspiration removes them, all inside a chamber kept formed by viscoelastic and infusion: the corneal endothelium above and the posterior capsule below are the two irreplaceable membranes being sheltered from energy and instruments throughout.

  • Cortex removal and lens implantation

    Why does the implant go in the bag, specifically?

    The capsular bag is the lens's natural house: an implant unfolded there sits centred on the visual axis, behind the iris, exactly where the optics were calculated for. The cortex is aspirated clean first because retained cortex inflames and opacifies the future.

  • Sealing and after

    How does a sutureless incision stay shut?

    The corneal tunnel is built as a self-sealing valve: internal pressure presses its roof shut. Hydration of the wound edges and a final pressure check confirm the seal, because a leaking wound is a hypotonous eye with an open door, and the operation's last act is proving the door shut.

Decision points

  • The posterior capsule tears during phaco with vitreous presenting.

    • Stabilise, vitrectomy of the prolapse, plan the lens

      The complication has a protocol: no chasing fragments into the vitreous, anterior vitrectomy done properly, and the implant placed where support allows, sulcus if not bag.

    • Persist with routine steps

      The error that compounds: traction on presenting vitreous is retinal traction, and a dropped nucleus is a vitreoretinal referral, not a longer phaco.

    Posterior capsule rupture is the operation's defining complication and it is managed by doctrine, not improvisation: recognise early (deepening chamber, sudden mobility), stop, protect, and change the plan. The visual outcome tracks the calm of the response more than the tear itself.

  • Which refractive target for the intraocular lens?

    • Distance emmetropia

      The common default: clear distance, readers for near, and the biometry conversation documented.

    • Deliberate myopia or monovision

      For the lifelong myope who reads unaided, or the planned near-dominant eye: the target is a life choice, chosen with the patient.

    The operation fixes the optics it was asked to fix: the target discussion in clinic is as much a part of the surgery as the biometry that serves it, and the second eye's plan is written with the first eye's result in hand.

Leaving the OR

The handoff

Procedure
Phacoemulsification with in-the-bag IOL, left eye, topical anaesthesia
Course
Uncomplicated; rhexis complete, capsule intact, wound sealed at pressure check
Target
Distance emmetropia; biometry per record
Watch for
Pain with worsening vision (endophthalmitis pathway taught), drop regimen started, shield at night

A fictional educational patient, handed over the way real ones are.

The postoperative course

  1. Day 0Home within hours with drops and a shield: mild grittiness and glare are expected, and the emergency sentence (pain plus falling vision means call now) is taught before leaving.
  2. Days 1-7Vision clears progressively on the drop regimen; the endophthalmitis window keeps the emergency sentence relevant all week.
  3. Weeks 2-4Refraction settles; new glasses if needed; the second eye scheduled with the first's refractive result informing its target.
  4. Months to yearsPosterior capsule opacification can mist the vision late: a minutes-long laser capsulotomy restores it, the operation's one common sequel and its easiest fix.

Watch it done

Find Phacoemulsification with IOL videos on YouTube

What can go wrong

Surgical-site infection
Live this operation as a case →Live this operation as a case →OR Prep this operationReview the instruments