Just like a camera each eye has a lens that focuses light on to the retina so we can see. As long as the lens is clear there will be no problem. When the lens gets cloudy, vision becomes blurry, as though we are seeing through a fogged-up or frosty glass. This makes reading, driving and seeing difficult.
Cataracts develop slowly and with time as they progress they begin interfering with vision. Cataract surgery is the only remedy for cataract.
- Clouded or dim vision
- Increasing difficulty in vision especially at night
- Light and glare sensitivity
- Requiring brighter than usual light for clarity
- Halos around lights
- Frequent changes in eye glass prescription
- Difficulty in reading
- Fading colours
- Double vision in one eye
How Cataract is Diagnosed?
A regular eye examination by an ophthalmologist is the only way to diagnose cataract. On dilation of the pupils the lens and inner eye can be viewed for accurate diagnosis.
What are the different types of cataracts?
- Age-related cataract:Most cataracts are related to aging.
- Congenital cataract:Some babies are born with cataracts or develop them in childhood, often in both eyes. These cataracts may not affect vision. If they do, they may need to be removed.
- Secondary cataract:Cataracts are more likely to develop in people who have certain other health problems, such as diabetes. Also, cataracts are sometimes linked to corticosteroid use.
- Traumatic cataract:Cataracts can develop soon after an eye injury, or years later.
Types of Cataract Surgery Lenses
Monofocal Fixed Focus Intraocular Lenses -cataracts that was removed is replaced with an IOL that is positioned in the same place as the natural lens. The standard IOL is a monofocal lens that corrects distance vision. With this lens, you see well from a distance, but need glasses to read.
Multifocal IOLs – Multifocal lenses provide distance and intermediate and/or reading vision.
Toric IOLs – These fixed focus single-vision lenses help people with astigmatism see better for distance or for near vision than they would with a non-Toric single vision IOL.
Accommodating Intraocular Lenses – Alternatives to standard monofocal lenses, these accommodating lenses provide distance and some near vision. An “accommodating” intraocular lens gives good distance vision and usable intermediate distance vision for a computer screen.
Treatments for Cataract
Cataract Extraction Surgery – Surgical removal of a clouded lens is considered the best, most successful treatment for this condition. the femtosecond cataract laser which can be used just before surgery to soften the cataract and reduce astigmatism. The surgery is performed through a small opening at the front of the eye. The surgeon gently breaks up and vacuums out the clouded cataractous lens with high frequency ultrasound. This lens is then replaced with a new artificial lens, called intraocular lens (IOL).