Eyesight
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Crystalens FAQ
Questions about Crystalens IOLs
Nearsighted & Farsighted Surgery
The following information answers questions that we frequently hear from our patients about Crystalens IOLs however, some of these questions also apply to Cataract Surgery and other intraocular lenses (IOLs) including ReSTOR and Tecnis. For more information, please contact us.
- What does IOL mean?
- What are IOLs?
- What are cataracts?
- How is Crystalens different?
- What is Presbyopia?
- What can Crystalens do that LASIK cannot?
- How do I know if I need Crystalens?
- How do I know if I have cataracts?
- Are there different kinds of cataracts?
- What causes cataracts?
- Do only older people get cataracts?
- Is cataract surgery or the Crystalens procedure dangerous to your eyes?
- Is cataract surgery done with a laser?
- How much time must go by before the second eye is treated?
- I wear contact lenses. Can I wear them to your office for cataract surgery?
IOL stands for Intraocular lens.
Intraocular lenses are artificial lenses created to replace clouded natural lenses, caused by cataracts. In addition, IOL's can be implanted "electively". This means patients who want to reduce or eliminate their need for glasses, who may not have visually significant cataracts, can also have the procedure. The cost of procedure would be paid for without the assistance of their insurance company.
Cataracts are patches that form in the eye’s crystalline lens and are caused by changes in water and proteins that make up the lens. Over time, cataracts cloud the lens and do not allow light to reach the retina, producing blurred vision.
Crystalens is a special intraocular lens that was specially created to correct presbyopia, an age-related condition that typically occurs between the ages of 40 and 50, that keeps the eye from focusing at all distances. Crystalens can be implanted in patients over 50 years old with or without cataracts. Crystalens is the only FDA approved accommodating lens for cataracts and/or patients with multiple visual deficiencies.
Presbyopia is an age-related condition that generally happens between the ages of 40 and 50. The condition prevents the eye from focusing at all distances and causes blurry vision, especially close-up. Often, the first sign is difficulty reading fine print at a close distance, but being able to read fine print better when held further away.
What can Crystalens do that LASIK cannot?
Although LASIK can satisfy the need for distance vision glasses, patients over 45 still require reading glasses for intermediate (computer distance) and near vision, caused by presbyopia. With Crystalens, presbyopia can be corrected for patients who desire good uncorrected vision at all ranges.
How do I know if I need Crystalens?
Only your eye doctor or eye surgeon can tell you for sure. However, if you have presbyopia, are over 50 years of age, or have cataracts, Crystalens nearsighted and farsighted surgery may be a good option for you.
How do I know if I have cataracts?
At first, it's hard to tell. You'll notice some deterioration of your vision, such as more sensitivity to lights at night, colors look less vivid and bright, double vision, or some blurriness. Initially, a new glasses or contact lens prescription might help, but at some point, cataract surgery may become necessary. If cataracts develop in both eyes, each eye can be treated separately, so you retain your vision and functionality in between surgery dates.
Are there different kinds of cataracts?
Yes, there are three main kinds:
- Nuclear cataracts - the most common kind, that comes with advancing years, and begins in the center of the lens;
- Cortical cataracts - develops in diabetics and begin at the edge of the lens - extending inwards - causing blindness when they reach the center;
- Subcapsular cataracts - also found in people with diabetes, in young people, and/or those who take steroids over a long period of time. These cataracts develop rapidly starting in the back of the lens and produce symptoms such as glare, difficulty with night driving, and reading.
The cause isn't clear, however, studies have been done that suggest some risk factors include:
- Diabetes
- Prolonged use of steroids
- Prolonged exposure to ultraviolet light (sunlight)
- Exposure to cosmic radiation
- Over-consumption of alcohol
- Prolonged exposure to air pollution
- Exposure to lead
Do only older people get cataracts?
No. Advancing age is certainly a predisposing factor, and by the age of 75 or so, nearly everyone is said to have at least the beginning of a cataract. However, some babies are born with congenital cataracts, some apparently inherited, and others, are the result of the mother having an infectious disease while pregnant, such as chickenpox or German measles. Young healthy patients can also develop cataracts as stated above.
Is cataract surgery or the Crystalens procedure dangerous to your eyes?
All surgery carries some risk, and cataract surgery is no exception. However, cataract surgery is the most commonly performed procedure in the U.S., and if you choose an experienced eye surgeon, risk is minimal.
Is cataract surgery done with a laser?
Most commonly the lens is removed with ultrasound rather than a laser to break up the lens with the cataract before removing it. Also, after some surgeries, the pocket, or membrane that encloses the eye's lens becomes cloudy after the lens is removed, and in these cases, a laser can be used to make a clear opening in that membrane, so that vision isn't impeded.
How much time must go by before the second eye is treated?
The second surgery can be performed one day after the first surgery, but we prefer to wait at least a week to ensure the first operative eye is healing well.
I wear contact lenses. Can I wear them to your office for cataract surgery?
No. We will be taking a number of measurements of your eyes. These measurements enable us to measure the thickness and curvature of your eye. It is important that candidates do not wear the following prior to the diagnostic evaluation and surgery:
- soft contact lenses for 5 days;
- toric lenses for 2 weeks; or
- hard contact lenses for 8 weeks.
Our Services
Eyesight Ophthalmic Service founded in 1983, we are southern New Hampshire's leading provider of eyecare for adults and children.
Specializing in:
Cataract Surgery
Macular Denegeration
BOTOX and Eyelid Surgery, Glaucoma
Routine Eyecare, Contact lenses
Designer frames and sunglasses
Low vision rehabilitation
Clinical Research
Diabetic Eye disease
Dry eye treatments, Laser Vision
Cataract & Premium Lens Options
Our skilled team of doctors will help you make the best decision on your cataract lens choices, whether they are monofocal or premium lenses. We offer a wide range of Premium Lenses including Crystalens, ResTOR, Tecnis and Acrysof Toric. Our doctors will help you determine which is best for your lifestyle.
Cataract & Premium Lens OptionsInformation for New Patients
Prepare for your visit and save time in the waiting room, with our downloadable patient forms. Take the time to download our patient forms and fill them out before your visit. Our friendly office staff will be glad to assist you if you have any questions.
Information for New Patients