In Bhandari starlife eye hospital in Ludhiana we try to do our best for each and every patient

Modern cataract surgery is a highly refined procedure designed not only to remove the cloudy natural lens but also to improve visual quality and, in selected patients, reduce dependence on spectacles. With advances in phacoemulsification, femtosecond laser technology, biometry and intraocular lens (IOL) design, treatment can be tailored to the individual patient's eyes, lifestyle and visual expectations.

The choice of surgical technique and IOL depends on the density of the cataract, corneal health, retinal and optic nerve status, ocular measurements, pre-existing eye conditions and the patient's visual needs.

1. Preoperative check-up before cataract surgery

A comprehensive preoperative assessment is essential for selecting the correct surgical approach, calculating IOL power and minimising complications.

A. Detailed history and visual assessment

• Presenting complaints: blurred vision, glare, halos, difficulty reading or night driving.

• Duration and progression of symptoms.

• Previous eye surgery, trauma, glaucoma, uveitis or retinal disease.

• Diabetes, hypertension, cardiac disease, allergies and current medications.

• Previous refractive surgery, contact lens use and spectacle prescription.

• Unaided and best-corrected visual acuity, refraction and assessment of visual needs.

B. Detailed ocular examination

• Slit-lamp examination of the cornea, anterior chamber, iris and lens.

• Cataract type and grade: nuclear, cortical, posterior subcapsular or mixed.

• Pupil size, pseudoexfoliation, phacodonesis and zonular stability.

• Intraocular pressure (IOP).

• Dilated fundus examination to assess the macula, optic nerve, retina and peripheral retina where indicated.

• Assessment of the ocular surface, including dry eye and meibomian gland dysfunction.

C. Biometry and IOL power calculation

• Axial length measurement.

• Keratometry and corneal astigmatism assessment.

• Anterior chamber depth and lens thickness, where available.

• Optical biometry is preferred when reliable; ultrasound biometry is useful when optical measurements fail.

• Modern IOL formulas, such as Barrett Universal II, Kane or other suitable validated formulas, are selected according to the eye and available measurements.

• Corneal topography or tomography is particularly useful when considering toric IOLs, irregular corneas or previous refractive surgery.

D. Additional investigations when indicated

• Macular OCT if macular disease is suspected, visual potential is uncertain or a premium IOL is being considered.

• Corneal endothelial cell count in Fuchs dystrophy, corneal guttata or other cases at increased risk of endothelial decompensation.

• B-scan ultrasonography if the fundus cannot be visualised and posterior segment assessment is required.

• Glaucoma evaluation, retinal consultation or other investigations according to clinical findings.

• Blood glucose, blood pressure, ECG and other systemic tests according to the patient's health, anaesthetic plan and institutional protocol.

Important: Routine extensive systemic testing is not necessary for every otherwise healthy patient undergoing uncomplicated cataract surgery under local or topical anaesthesia. Testing should be guided by history, examination and the proposed anaesthetic technique.

2. Modern cataract surgery techniques

1. Phacoemulsification (Phaco)

The most widely used technique for routine modern cataract surgery. A small corneal incision is made, the lens is opened with a circular capsulorhexis, and ultrasound energy breaks the cataract into fragments that are aspirated. A foldable IOL is implanted through the small incision.

Advantages: Small incision, rapid recovery, limited surgically induced astigmatism and usually no sutures.

2. Femtosecond laser-assisted cataract surgery (FLACS)

A femtosecond laser assists with corneal incisions, capsulotomy and lens fragmentation. Phacoemulsification is generally still required to remove the lens material.

Advantages: Automated precision for selected surgical steps.

Limitations: Higher cost and additional equipment; it has not consistently demonstrated superior final visual outcomes over well-performed conventional phacoemulsification in routine 

For most routine cataracts, modern phacoemulsification with a foldable posterior chamber IOL is the standard approach where equipment and surgical expertise are available. The safest technique depends on the individual eye, not simply on which technology is newest.

3. Step-by-step procedure of modern phacoemulsification

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A typical uncomplicated phacoemulsification procedure involves the following steps.

1. Preparation and anaesthesia

   The eye is cleaned with an appropriate antiseptic, usually povidone-iodine, and draped under sterile conditions. Topical anaesthesia is commonly used; intracameral or regional anaesthesia may be used when indicated.

2. Corneal incision

   Small, self-sealing corneal incisions are created, commonly around 2.2–2.8 mm depending on the instrument and surgical technique.

3. Capsulorhexis

   A controlled circular opening is created in the anterior lens capsule to provide access to the cataract and allow stable positioning of the IOL.

4. Hydrodissection and nucleus removal

   Fluid separates the lens cortex from the capsule. The nucleus is fragmented and aspirated using ultrasound energy through the phaco handpiece.

5. Cortical aspiration

   Remaining cortical lens material is removed while protecting the posterior capsule and other intraocular structures.

6. IOL implantation

   A foldable IOL of the calculated power is injected into the capsular bag in most routine cases. Toric lenses require appropriate rotational alignment.

7. Final checks

   Ophthalmic viscoelastic material is removed, the anterior chamber is stabilised, incisions are checked for leakage, and appropriate postoperative medication is prescribed.

The duration varies with cataract density, pupil behaviour, ocular anatomy and surgical complexity. An uncomplicated procedure often takes approximately 10–20 minutes of operating time, although the overall time in the surgical facility is longer.

4. Types of intraocular lenses (IOLs) available

The IOL is one of the most important decisions in modern cataract surgery. The appropriate lens should be selected according to the patient's refractive error, corneal astigmatism, ocular health, lifestyle, expectations and budget. No single IOL is ideal for every patient

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1. Monofocal IOL

Standard option

Provides one main focal distance, usually distance vision.

• Excellent option for many routine cataract patients.

• Generally good contrast and fewer dysphotopsias than many multifocal designs.

• Reading or computer glasses may still be needed, depending on the refractive target.

• Can also be targeted for intermediate or near vision in selected patients.

2. Toric IOL

Corrects corneal astigmatism in addition to the spherical refractive error.

• Available in monofocal and certain multifocal or EDOF platforms.

• Particularly useful when regular corneal astigmatism is clinically significant.

• Requires accurate measurements, appropriate surgical planning and rotational alignment.

• Residual astigmatism can remain if the lens rotates or the measurements are inaccurate.

3. Multifocal IOL

Designed to provide more than one focal distance, often distance and near, with some designs also providing intermediate vision.

• Can reduce dependence on spectacles for reading and distance activities.

• Suitable for carefully selected patients seeking greater spectacle independence.

• May produce halos, glare, reduced contrast or difficulty with night driving.

• Requires careful assessment of the cornea, macula, optic nerve and patient expectations.

4. Extended depth-of-focus (EDOF) IOL

Extends the range of functional focus, especially distance and intermediate vision.

• Useful for computer work, dashboards and many everyday activities.

• Near-reading glasses may still be needed, particularly for small print.

• Some designs may cause halos or glare, although the extent varies by lens design.

• A suitable option for selected patients who want a wider range of vision.

5. Enhanced monofocal IOL

An evolution of conventional monofocal technology, designed to improve intermediate functional vision while retaining the characteristics of a monofocal lens.

• Often useful for patients who want good distance vision and improved intermediate function.

• Usually does not provide the same near range as a trifocal IOL.

• May be considered where minimising optical disturbances is a priority.

The best approach is to match the lens to the patient's eyes and daily activities rather than selecting solely on price or technology.

Patient profile                                                                                                IOL options to discuss

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Patient seeking economical, dependable vision                                        Monofocal

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Significant regular corneal astigmatism                                                      Toric monofocal or another suitable toric platform

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Frequent computer use and desire for better intermediate vision            Enhanced monofocal or EDOF

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Strong desire for reading and distance spectacle independence            Multifocal/trifocal, if ocular health and expectations are suitable

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Frequent night driving or high sensitivity to glare can be problem with multifocal/trifocal

 Postoperative care and recovery

After surgery, patients are generally advised to:

• Use prescribed antibiotic and anti-inflammatory eye drops according to the surgeon's instructions.

• Avoid rubbing or pressing the operated eye.

• Use the protective eye shield as advised, especially during sleep in the early postoperative period.

• Avoid swimming and activities that may contaminate or injure the eye until cleared by the surgeon.

• Attend follow-up visits, including early assessment of visual acuity, IOP, wound integrity and inflammation.

• Obtain a spectacle prescription once refraction has stabilised, if glasses are required.

Many patients notice improved vision within the first few days, although recovery varies. Final visual results depend on healing, refractive accuracy and any coexisting eye disease.

Possible complications

Modern cataract surgery has a high success rate, but complications can occur, including:

• Posterior capsule rupture or vitreous loss.

• Corneal oedema or endothelial damage.

• Raised IOP or postoperative inflammation.

• Cystoid macular oedema.

• Infection, including the rare but serious complication of endophthalmitis.

• Residual refractive error, IOL rotation or decentration.

• Posterior capsule opacification (PCO), which may develop months or years later and can often be treated with Nd:YAG laser capsulotomy.

Urgent warning: Severe or increasing eye pain, sudden reduction in vision, marked redness or increasing light sensitivity after surgery requires urgent ophthalmic assessment.

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