Overview
A cataract develops when the natural lens of the eye becomes cloudy, gradually affecting clear vision. Cataract surgery removes the cloudy lens and replaces it with an artificial intraocular lens (IOL), helping restore clearer vision and improve daily activities.
Modern cataract procedures are generally performed through a small incision using advanced techniques such as Phaco cataract surgery. Depending on the patient's eye health, visual needs, and suitability, different lens options may be considered.
At Sarvodaya Hospital, ophthalmologists evaluate each patient individually and recommend the most appropriate cataract operation, surgical technique, and lens option based on the condition of the eye.
Symptoms of Cataract
- Blurred or cloudy vision
- Difficulty seeing at night
- Increased sensitivity to bright lights
- Halos around lights
- Faded or less vivid colours
- Frequent changes in spectacle prescription
- Difficulty reading or recognising faces
- Double vision in one eye
- Reduced vision despite wearing glasses
Causes and Risk Factors
- Ageing
- Diabetes
- Eye Injury
- Long-Term Steroid Use
- Excessive UV Exposure
- Family History
Diagnosis of Cataract
A detailed eye examination helps determine whether cataracts are responsible for vision problems and whether surgery is appropriate.
- Visual Acuity Test : This test measures how clearly you can see at different distances and helps determine the extent to which reduced vision is affecting everyday activities.
- Slit-Lamp Examination : A slit-lamp microscope allows the ophthalmologist to examine the cornea, iris, lens, and other structures of the eye in detail.
- Dilated Eye Examination : Eye drops enlarge the pupil so the doctor can examine the lens, retina, optic nerve, and other internal structures for associated eye conditions.
- Tonometry : Tonometry measures pressure inside the eye and helps identify glaucoma or other conditions that may influence surgical planning.
- Biometry and Lens Measurement : Advanced optical measurements determine the eye's dimensions and help calculate the appropriate power of the artificial lens to be implanted during surgery.
- Corneal Mapping : Corneal topography or tomography may be recommended for selected patients to assess corneal shape and support accurate surgical and lens planning.
Treatment Options & Technology for Cataract Surgery
The choice of procedure depends on cataract severity, eye health, lifestyle requirements, and the patient's visual expectations.
- Phaco Cataract Surgery: Phaco cataract surgery uses an ultrasound-powered instrument to break the cloudy natural lens into small pieces before removing it through a small incision. An artificial lens is then implanted.
- Laser Cataract Surgery : Laser cataract surgery uses a specialised laser for selected steps of the procedure. It may offer precise incisions and lens fragmentation in suitable patients after thorough evaluation.
- Bladeless Cataract Surgery : Bladeless cataract surgery generally refers to laser-assisted cataract surgery, where a femtosecond laser performs certain surgical steps instead of conventional manual instruments.
- Cataract Surgery with Lens Replacement: During cataract surgery with lens replacement, the cloudy natural lens is removed and replaced with an artificial intraocular lens, restoring the eye's ability to focus light.
- Advanced Lens Replacement Surgery: Different IOL designs can address specific visual requirements. Depending on suitability, monofocal, multifocal, extended-depth-of-focus, or toric lenses may be considered.
- Painless Cataract Surgery: Modern cataract procedures are generally performed using local or topical anaesthesia, helping minimise discomfort during surgery. Patients may experience pressure or mild sensations rather than significant pain.
- Technology Used in Cataract Care: Advanced ophthalmic equipment such as Optical Biometry, Optical Coherence Tomography (OCT), Corneal Topography, Slit-Lamp Examination, Femtosecond Laser systems, and phacoemulsification technology supports accurate assessment and surgical planning.
Benefits of Cataract Surgery
When cataracts begin interfering with daily life, surgery can provide significant functional benefits.
- Improves Vision: Removing the cloudy lens allows light to pass more clearly through the eye, improving visual clarity.
- Improves Night Vision: Successful cataract surgery may reduce difficulties associated with glare, halos, and poor visibility in low-light conditions.
- Supports Daily Activities: Improved vision can make activities such as reading, working, driving, and recognising faces easier, depending on the patient's overall eye health.
- Improves Colour Perception: Removing a cloudy lens may help colours appear brighter and clearer.
- Long-Term Visual Improvement: Once the cataract is removed, it does not grow back because the cloudy natural lens has been replaced with an artificial lens.
Prevention & Eye Care
Age-related cataracts cannot always be prevented, but certain habits can support overall eye health.
- Protect Your Eyes from UV Radiation: Wear sunglasses that provide appropriate UV protection and use a hat when spending extended periods outdoors.
- Manage Diabetes: Keeping blood sugar within the recommended range may reduce the risk of diabetes-related eye complications.
- Avoid Smoking: Smoking is associated with several eye conditions and may increase the risk of cataract development.
- Maintain a Balanced Diet: A varied diet containing vegetables, fruits, whole grains, and other nutrient-rich foods supports general and eye health.
- Attend Regular Eye Examinations: Routine eye examinations can detect cataracts and other eye conditions early, particularly in older adults and people with risk factors.
When Should You See a Cataract Surgery Specialist?
An ophthalmologist should evaluate vision changes when they begin affecting everyday activities. Consider an eye examination if you experience:
- Persistent blurred vision
- Difficulty reading despite updated glasses
- Increasing night-vision problems
- Glare or halos around lights
- Frequent changes in spectacle prescription
- Difficulty performing work or routine activities
- Progressive reduction in vision
Pre- and Post-Surgery Care
Before Cataract Surgery
- Complete eye examination
- Accurate eye measurements and biometry
- Assessment of cornea and retina
- Review of existing medical conditions and medicines
- Discussion of suitable IOL options
- Detailed surgical counselling
After Cataract Surgery
- Use prescribed eye drops as directed
- Avoid rubbing or pressing the operated eye
- Protect the eye from dust and accidental injury
- Attend scheduled follow-up appointments
- Follow activity restrictions advised by the ophthalmologist
- Report significant pain, sudden vision loss, increasing redness, or other concerning symptoms promptly
Reviewed & Updated On
Reviewed by Dr. Madhur Bhatia Associate Director - Ophthalmology on 16 Aug 2026.
