Cataract Surgery


Sarah Lewis, PharmD

What is cataract surgery?

Cataract surgery is the surgical removal of the lens of your eye when it has developed a cataract. Cataract surgery restores vision when cataracts cause vision loss.

A cataract is a clouding or loss of transparency in the lens of your eye. Cataracts interfere with vision and usually develop as a result of normal aging. In most cases, the diseased lens is replaced with an artificial lens implant called an intraocular lens (IOL). The IOL becomes a permanent part of your eye.

Cataract surgery is a common surgery with significant risks and potential complications. You may have less invasive treatment options. Consider getting a second opinion about all of your treatment choices before having cataract surgery.

Types of cataract surgery

The types of cataract surgery procedures include:

  • Phacoemulsification, also known as phaco, is short or small incision cataract surgery. In this procedure, your surgeon makes a small incision in the side of your cornea, the clear dome that covers the front of your eye. A tiny ultrasound probe is inserted through the incision. The ultrasound probe softens and breaks up your lens. Your doctor removes the lens with suction and replaces it with an IOL.

  • Extracapsular surgery requires a slightly longer incision in the side of your cornea. Your surgeon removes your entire lens in one piece through this incision. The IOL is inserted through this incision.

Types of intraocular lens (IOL) implants

The types of intraocular lens implants include:

  • Accommodative lens moves forward and backward in response to your eye muscles. It mimics the movement of your natural lens. This provides excellent near, intermediate and distance vision. An accommodative lens may reduce or eliminate the need for glasses.

  • Monofocal lens was the first lens developed for cataract surgery. It is considered the standard lens for cataract surgery. A monofocal lens is a single-focus lens. This means it can be set for near, intermediate or distance vision. Most people choose to set their monofocal lens for clear distance vision and use reading glasses for near vision.

  • Multifocal lens is designed to provide near, intermediate and distance vision in one implant. It accomplishes this through a series of rings set for each vision range. Think of it as a bull’s-eye target with each ring representing a different vision range. Your brain learns which ring to use to focus images. A multifocal lens also reduces or eliminates the need for glasses.

  • Toric lens is a type of monofocal lens that also corrects for astigmatism. Astigmatism is caused by abnormal curvature of the cornea. It can cause two focal points to fall in two different locations, making objects both up close and at a distance appear blurry. As with other monofocal lenses, you may need reading glasses to focus your near vision.

Other procedures that may be performed

Your doctor may perform one or more other procedures in addition to cataract surgery. These include:

  • LASIK, which stands for laser-assisted in situ keratomileusis. It is a minor but technical surgical procedure used to correct certain types of blurry vision (called refractive errors) including farsightedness, nearsightedness and astigmatism. Your doctor uses a laser to remove very thin layers of your cornea to change its shape and produce clearer vision.

  • Limbal relaxing incisions are a series of small incisions that help correct astigmatism. This procedure allows your cornea to take on a more round and symmetrical shape.

Why is cataract surgery performed?

Your doctor may recommend cataract surgery to treat advanced cataracts that are interfering with your vision. Cataracts are generally not treated until they begin to affect your vision noticeably. Some minor symptoms of cataracts, including dulling of vision or small changes in visual acuity, may be improved by nonsurgical approaches. These include improved lighting or changes in eyewear prescriptions. If both of your eyes require cataract surgery, they are usually done separately, at least four to eight weeks apart.

In most cases, cataract formation occurs as a result of aging. However, it may also be triggered by injury to the eye, eye surgery, exposure to radiation, or excess sun exposure. Cataracts may also be a birth defect.

Surgery is the not the only treatment for cataracts. Your doctor may only consider cataract surgery for you if nonsurgical options have not been effective. Ask your doctor about all of your treatment options and consider getting a second opinion before deciding on cataract surgery.

Who performs cataract surgery?

An ophthalmologist will perform your cataract surgery. An ophthalmologist is a doctor with specialized training in diseases, conditions and surgery of the eye.

How is cataract surgery performed?

All cataract surgery involves an incision in the side of your cornea. Your cornea is the clear dome that covers the front of your eye. There are, however, different approaches to the surgery that your doctor may choose. Ophthalmologists perform cataract surgery in hospitals and outpatient surgery settings.

Surgical approaches to cataract surgery

Small incision cataract surgery, also known as phacoemulsification or phaco, is the most common form of cataract surgery. It uses a small incision in the side of your cornea and a tiny ultrasound probe to soften and break up your lens. Your doctor removes your lens with suction through the small incision. The intraocular lens (IOL) implant is inserted through the same small incision.

Extracapsular cataract surgery uses a slightly longer incision in the side of your cornea. Your doctor removes your lens in one piece and inserts your IOL through this incision.

Your doctor may or may not use stitches or sutures to close your incision. If your doctor uses sutures, they may need to be removed at a future visit.

Your doctor will determine which type of surgery is best for you and how long you need to stay in the hospital or surgical center based on your diagnosis, age, medical history, general health, and possibly your personal preference. Learn about the different cataract surgery procedures and ask why your doctor will use a particular type of procedure for you.

Types of anesthesia that may be used

Your doctor will perform cataract surgery using local or general anesthesia.

  • General anesthesia is a combination of intravenous (IV) medications and gases that put you in a deep sleep. You are unaware of the procedure and will not feel any pain.

  • Local anesthesia involves eye drops to numb the eye or injecting an anesthetic around nerves in your eye so you do not feel anything. You will likely have sedation to keep you relaxed and comfortable.

What to expect the day of your cataract

The day of your surgery, you can generally expect to:

  • Speak with a preoperative nurse. The nurse will perform an exam and ensure that all needed tests are in order. The nurse can also answer questions and will make sure you understand and sign the surgical consent.

  • Remove all clothing and jewelry and dress in a hospital gown. It is a good idea to leave all jewelry and valuables at home or with a family member. Your care team will give you blankets for modesty and warmth.

  • A surgical team member will start an IV.

  • The surgical team will monitor your vital signs and other critical body functions. This occurs throughout the procedure and your recovery until you are alert, breathing effectively, and your vital signs are stable.

What are the risks and potential complications