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BIOLOGY ASSESSMENT TASK: COMMUNICATION
(A) CATARACTS
Blindness has been categorised by the World Health Organisation as one of the most severe disabilities. ...
The Lens and Refraction In order to gain an opulent grasp of cataracts and cataract technology, it is essential to firstly possess knowledge of the area of the eye in which cataracts manifest: the lens. ...
Cataracts
A cataract is a clouding of an area of the eye called the crystalline lens. ... An individual suffering from a cataract, views the world as if through a ‘dirty window’, with glare and colour acuity becoming subdued. ... Ultimately, the cataract will have to be removed from the eye through a minor operation. ... Another common indication that a cataract has developed is that the individual perceives colours differently, in that blue appears duller, while reds, yellows and oranges look more intense. ... In majority of situations the person who is affected will only detect a minor change in their eyesight in early stages of cataract formation.
Cataracts can be discovered with a full optical assessment. ...
Cataract surgery is normally quick, relatively painless and quite successful. ... Cataract surgery is generally conducted under local anaesthesia as an outpatient procedure. ... The second option is cataract glasses or contact lenses which are used in those 10% who are poor contenders for IOLS.
Cataract surgery is usually successful, however with any operation, there always exists the presence of risk. Therefore complications that may occur following cataract surgery and lens implantation include; infection, bleeding, high pressure in the eye, problems with the lens (such as damage or displacement), retinal detachment, swelling of the cornea, drooping eyelids, clouding of the cornea, blindness and even loss of the eye. Surgery is the only successful means of treating cataracts with neither diet nor medications proving to stop cataract development. However preventative actions include wearing ultraviolet sunglasses and having a healthy lifestyle in general, exempt from smoking which accelerates cataract formation. Also if feasible, a dietary program should be instigated for at least three to four months prior to contemplating cataract surgery. ... Animal studies show that reducing calories by 20 to 40 percent causes a 30 to 50 percent decline in cataract formation, along with a 30 percent increase in life expectancy, improved immune defence and reduced risk of cancer. Cataract surgery is now a commonly performed procedure in majority of the world, with in excess of one million operations being conducted each year. Though 95 percent of cataract sufferers gain enhanced vision after surgery, ignorance and fear continue to motivate many to hesitate in obtaining treatment. ...
Cataract Technology
Technological improvements in regard to cataract surgery have had a momentous impact upon society. Cataract surgery is no longer the rigorous and lengthy operation it was 50 years ago and the success rate has been dramatically increased. ... However, entrepreneur, Fred Hollows went about confronting the technical and financial concerns which were obstructing the prevalent implementation of modern cataract surgery throughout the developing world. ... He instigated various programs, in which 500 doctors in Nepal, Vietnam and Eritrea were taught modern cataract procedures, in particular how to insert intraocular lenses. ...
However, innovative new technologies in the field of cataract treatment, prominently phacoemulsification have further improved the success rate of operations. ... Cataract surgery is constantly becoming more complex and advanced technically as it masters new ways of increasing its efficiency and effectiveness.
Approximate Word count = 2733
Approximate Pages = 10.9
(250 words per page double spaced)
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