A cataract is a kind of eye problem, which causes clouding of the eye's natural lens, which lies backward the position of the iris and the pupil. While Cataracts are usually generated or develop in both of the eyes, but in-case very rarely they only affect one eye. Most of the cataracts are usually occur as a result of a person getting older, or moreover usually happens after the age of 40.Cataracts are now said to be most common issue of losing vision worldwide, but they can be easily treatable.
Causes of cataracts
As we getting older, the presence of proteins in the body which makes up the eye's natural lens can clump its process together. These clumps on the eye are cataracts and this which cause cloudiness in the eyes. Sometimes, it might grow or expand even larger and results in cloud more of the lens, which results in harder to see.
The lens presence inside the eye functions more like a camera lens, which is much focused in light onto the retina for vision clear in eyes. It also adjusts the eye's focus, letting us see things both up closer or distance away.
Water and protein make up most of the lens of the eyes. The protein which presence in the lens are just arranged in a precise way that keeps the lens clear and lets light pass through it more easily.
Actually, no one knows definitely for sure, why the eye's lens changes as we get older, which forming cataracts. Researchers in worldwide have identified some of the major factors that might be related to cataract development as well. While advancing in age, cataract risk factors might include:
- Ultraviolet radiation from sunlight and other sources
- Prolonged use of corticosteroid medications
- Statin medicines used to reduce cholesterol
A cataract which initially processes out from the minor stage and, at first, has little which effect on your vision as lesser impact. Some of the visual symptoms can take some months to years to become noticeable. You might feel like your vision is blurred a little, like looking through a cloudy piece of glass.
Cataracts can progress at several different rates in each eye, which results in visual symptoms in one eye and normal vision in the other as well. You may also notice the following symptoms with cataracts are:
- Light from the sun or a lamp seems too bright or glaring.
- Your eyes feel more sensitive to light.
- Oncoming headlights cause more glare than before when driving at night.
- Visual halos around bright lights.
- Double vision.
- Seeing at night or in low light is more difficult.
- Colors may not appear as bright as they once did.
- Blurry, cloudy, hazy or dim vision.
Types of cataracts
There are many cataracts types, but a few are much more common than the others.
- Nuclear cataracts
- Cortical cataracts
- Congenital cataracts
- Trauma-induced cataracts
- Posterior subcapsular cataracts
Eye doctors can use different tests to diagnose cataracts.
Slit-lamp exam: A slit lamp is a large, binocular microscope with a bright light source that’s mounted on a small space. It enables your eye doctor to closely examine your eye under high magnification.
Retinal exam: First, an eye doctor will dilate your eyes with eye drops, causing the pupils to slowly open. This gives the doctor a much better view of your eye. The doctor then examines the retina and optic nerve in the back of your eye.
Refraction: During refraction, your eye doctor determines the degree of your refractive errors and the eyeglass prescription that provides your best possible visual acuity. If your glasses prescription has changed and your vision can no longer be corrected to 20/20, it’s possible you may have a cataract developing.