Cataract Surgery with Glasses Independence
How do the eyes see?
The design of the human eye is much like that of a camera. Light rays are focused through the lens onto the retina, a layer of light-sensitive tissue at the back of the eye that is similar to photographic film. In a normal eye, light rays pass through a clear lens and are focused onto the retina. This produces a bright, clear image.
As we age, the lens of the eye can become cloudy. When the lens becomes cloudy enough to reduce your vision, it is called a cataract.
The result of this clouding is that the light cannot pass through the lens easily, and your vision becomes blurred.
The most common cause of cataract is aging. Other causes include: medications, such as steroids; systemic diseases, such as diabetes; and, exposure to ultraviolet light.
Cataract surgery is a painless, 20-minute outpatient procedure. Eye drops are used to dilate your pupil beginning one hour before the surgery. The dilation will enlarge the pupil, so that Doctor Murphy can remove the cataract easily. Immediately before the cataract surgery, anesthetic drops will be given to numb the eye. You will also be given a sedative to keep you relaxed and comfortable.
During the cataract surgery, Doctor Murphy makes a small incision at the edge of the cornea. A small ultrasound instrument is then inserted into the eye to break up, and vacuum out the cataract. The intraocular lens, also called the IOL, is then implanted into the eye. The incision is self-sealing, and does not require stitches. The result of the surgery is that the cloudy lens, or cataract, is removed, and replaced with a clear, artificial lens called an intraocular lens (IOL). The IOL will allow you to see clearly again.
Intraocular Lens or IOL
The most basic type of IOL is the monofocal, or fixed-focus IOL. The monofocal IOL helps you attain clearer vision, but most often eyeglasses are still required for you to see clearly at all ranges of distance.
Toric IOL's are designed to reduce the blurring that results from astigmatism. Doctor Murphy will measure your eye for astigmatism during your examination. If you have astigmatism, a toric IOL will usually be recommended to improve your vision without glasses.
The AcrySof® Toric IOL is made of a flexible acrylic material, which has excellent optical quality.
Another type of IOL is the multifocal IOL. The multifocal IOL has optical rings of different powers built into the intraocular lens. These different optical rings usually allow you to see clearly at far, near, and intermediate distances without eyeglasses.
The AcrySof® ReSTOR® multifocal IOL combines the latest technology in optical design with a proven acrylic material of excellent optical clarity.
A third type of IOL is the accommodating IOL. The accommodating lens has a hinge designed to work with your eye muscles, allowing the lens to move forward as the eye focuses on near objects and backward as the eye focuses on distant objects. This movement allows you to focus clearly at different distances.