Majority of the cataract cases are attributed to aging of an individual. As one ages there is also a higher possibility of acquiring cataract of the eyes. A cataract is a sickness in the eyes where lens in the eye are being clouded interfering the vision or clear eyesight. Cataracts are usual in older individuals specifically those aging in eighty years old or more. Individuals on this age have commonly undergone some eye surgeries with the aid of microscopy using the microscope for surgery. The cataract of one eye does not infect the other eye. It can transpire in either or both eyes. The clear portion of the eye that assists in focusing the light or an image in the retina is the lens. The light-sensitive tissue at the rear portion of the eye is known as retina. These parts of the eyes are better observed by means of microscopy using a microscope for surgery. In a normal eye, the light traverses through the transparent lens going to the retina. When it attains the retina, light is transformed into nerve signals that are brought to the brain. The lens should be clear for the retina to obtain a precise image. For individuals who are suffering from cataract, the image they view is blurry because the lens is cloudy. Surgical operations of eye cataract use some highly technological devices like the microscope for surgery. The microscope for surgery serves as magnifier of the small area being operated on.
Aside from the cataracts that are related to aging, there are other kinds of cataract. The four other kinds of cataracts are secondary cataract, traumatic cataract, congenital cataract and radiation cataract.
The secondary cataract is the cataract, which develops because of other health problems of a person such as diabetes. It can also develop after a patient underwent some surgical operation of the eye problems like glaucoma with the aid of microscope for surgery. There are also instances where cataract formation is attributed to steroid use.
The traumatic cataract is a cataract that has been formed because of an injury suffered by the eyes years after its incident. Traumatic cataract is taken from the word trauma, which usually relates to injuries or wounds or bad experiences.
The congenital cataract is a cataract formed from birth. There are infants who were born with cataracts or experience them in childhood frequently in both eyes. Such cataracts may be so tiny that they do not directly affect the vision or eyesight. In case they do interfere in the vision of the child, the lenses may need to be taken out.
The radiation cataract is the cataract formed subsequent to the exposure of the eyes certain kinds of radiation.
The lens is located at the back of the iris and the pupil. It serves more like a camera lens of the eyes. In order to record an image, the lens focuses light onto the retina at the rear portion of the eye. The lens also regulates the focus of the eyes, allowing us to view things clearly both up close and distance away. The lens is composed of mostly water and protein. The protein is set in a perfect manner that keeps the lens clear and allows the light to get through it.
Nevertheless, as a person age, certain protein may accumulate together and begin to cloud a tiny portion of the lens. This is what they call as cataract. As time passes by, the cataract may develop wider and cloud more of the lens, leading us to a blurry vision.
Researchers allege that there are some causes of cataract like smoking and diabetes. Or possibly because the protein in the lens simply varies from the wear and tear it undergoes over the years.Original article