What is Cataract?

Normally, the natural lens of the eye is clear and allows light rays to pass through easily. When cataract develops, the lens becomes cloudy and opaque. The light rays no longer pass through the lens easily, so the patient cannot see clearly. Cataract is not a new growth or a film over the eye. It is not contagious.

Drishti Eye hospital has been among the first pioneer institute in the Tricity to introduce this surgery.

Cataract surgery is done by the sophisticated PHACO Emulsification (stitchless surgery) technique with implantation of foldable IOLs. Hospital is equipped with latest phaco machines (namely NIDEK, MILLENIUM from Bausch and Lomb , WHITESTAR from AMO) and Optical Biometer ( for unmatched accuracy in IOL power calculation) to give our patients best refractive outcome.


Congenital Cataract

Cataracts in children are rare. They can be caused by infection of the mother during pregnancy, or they may be hereditary.

Secondary Cataract

Eye diseases like glaucoma, iritis, eye tumours, and diabetes may cause cataracts.

Traumatic Cataract

Eye injuries may cause cataracts in patients of any age.

Drug-induced Cataract

Prolonged treatment with steroid drugs, either for local (e.g., allergic conjunctivitis) or systemic diseases (e.g., asthma, skin allergies & joint pains) may lead to cataract formation.

Senile Cataract

This is the most common type of cataract, comprising 80 percent of the total cataracts. It occurs in patients usually above the age of 50.


Don’t wait for surgery till the cataract matures completely. Surgery can be done in any season with the help of Modern Technology (PHACO Emulsification- No Stitch Technique). It is not necessary to take bed rest or take any special precaution after surgery. A cataract which creates problem in daily work, should be operated upon immediately.


Cataract cannot be cured by medicines or spectacles. Removal of the clouded lens by surgery is the only treatment.Cataract surgery can be done by a conventional technique (Large incision) or Phaco-emulsification (Micro Incision/No-Stitch surgery).

Conventional Surgery

Traditional cataract surgery requires a large incision that spans the third of the circumference of the cornea (7-9mm). The cloudy lens is removed as a single piece. As many as seven stitches are required to close it after implanting an IOL (Intra Ocular Lens). One has to use pad bandage, dark glasses and eye shield and take recommended precautions in the post operative period for up to six weeks.

Phacoemulsification (Phaco) surgery

It is a no stitch micro incision cataract surgery. IOL is implanted and the wound is closed without any stitches.

A microprocessor controlled ‘PHACO’ machine- with tiny ultrasonic probe is used to remove cataract and a foldable intraocular lens implant is inserted through the smallest possible incision in the eye. PHACO uses ultrasound energy to liquefy lens and suck it out with a titanium probe . The minute incision is self sealing and needs no suture or stitch to close it. The patient is back to normal activities within a few days, including attending office or even doing heavy manual work.


Cataract formation is not associated with “signals” such as pain, redness or tearing. The common symptoms are:

  • Double vision.

  • Yellowing of colours.

  • Glare & sensitivity to light.

  • Blurring or dimness of vision.

  • Increasing difficulty with vision at night specially while driving.

  • Frequent changes in eyeglass or contact lens prescription.

What is IOL ?

Intra Ocular lens (IOL) is a tiny transparent convex lens to replace the cloudy cataractous lens in the eye. It is made of different materials like PMMA (polymethyl methacrylate, a harmless plastic substance), Silicon & Acrylic (Hydrophillic & Hydrophobic). Unlike contact lens, an IOL stays permanently in the eye and does not cause irritation. A foldable IOL is inserted into the eye through a device called IOL Injector through a small incision of 2-3 mm dimension.

At Drishti Eye Hospital we use the best quality Foldable Imported IOL’s of reputed multinational companies.

Advantages of IOL:-

Since the lens is placed inside the eye, most patients do not need glasses for clear distance vision. But patient has to wear reading glasses for near and intermediate vision tasks.

  • Images are clear and of the same dimension without distortion.
  • Full vision returns quickly.
  • Normal field of vision.

Types of IOLs:-

They fall into four basic categories:-

  • TORIC IOL’s.

Monofocal or unifocal’s

With monofocal lenses, your vision is typically in focus at only one distance – near, intermediate or far preferably FAR. Most people who choose monofocals have their IOLs set for distance vision and use reading glasses for near activities. On the other hand, a person whose IOLs were set to correct near vision would need glasses to see distant objects clearly.

Monofocal Toric IOL’s

This is a monofocal IOL with astigmatic correction built into the lens.

This eye condition distorts or blurs the ability to see both near and distant objects. With astigmatism the cornea (the clear front window of the eye) is not round and smooth (like a basketball), but instead is curved like a football. People with significant degrees of astigmatism are usually most satisfied with toric IOLs.

Monofocal IOL’s

These newer IOL types reduce the dependence on glasses or contact lenses for most of the daily tasks.

In the multifocal type, a series of focal zones or rings is designed into the IOL. Depending on where incoming light focuses through the zones, the person may be able to see both near and distant objects clearly. Multifocal lens implants offer the convenience of less dependence on reading glasses compared to standard lens implants. People with good natural distance vision often go without eyeglasses when outdoors or around the house. However, when they need to see something up close – even for just a moment – they often have to find and put on their reading glasses. Examples of common momentary near tasks would be a looking at a cell phone, a photo, a menu, a boarding pass, an envelope address, a handwritten note, or a price tag.

Who is a suitable candidate for multifocal’s

  • Wants to be less dependent on glasses.
  • Understands the limitations.
  • Willing to accept several week time to get adjusted to their new visual symptoms.

Who is not suitable candidate for multifocal’s-

  • Significant Dry Eyes.
  • Corneal Scarring.
  • Smaller Pupil Size.
  • Monofocal Implant in first eye.
  • Unstable capsular support.
  • Some one who is not ready for neuro adaptability.