Biology Communication Hsc Assignment

Topics: Cataract, Intraocular lens, Ear Pages: 4 (1037 words) Published: July 28, 2013
Biology Assessment Task - Communication

Describe cataracts and some of the technologies that can be used to prevent blindness from cataracts.

Cataracts:
A cataract is a clouding of the normally clear and transparent lens of the eye which results in decrease of vision. It is not a tumour, a new growth of skin or tissue over the eye, but a fogging of the lens itself. There are three types of cataract. They are:- a nuclear cataract- a cortical cataract- a subscapular cataract A nuclear cataract is located in the nucleus - the centre of the lens. The cause of this cataract is likely due to changes in the protein structure as we grow older. A cortical cataract develops from the outside of the lens extending over time to the centre. This cataract occurs often by people with diabetics. A subscapular cataract begins at the back of the lens. People with diabetes, high far-sightedness, or those taking high doses of steroids have a higher risk of developing this form of cataract.

Technologies:
Technology can provide both temporary relief and a permanent resolution in regards to cataracts. In the beginning stages of cataracts, the associated symptoms may be improved with new spectacles, anti-glare sunglasses or magnifying lenses. However, as the cataracts develop overtime, surgery becomes the most viable option in saving vision. The cataract surgery consists of the replacement of the cloudy lens with an artificial intraocular lens (IOL). Cataract surgery is usually only necessary when the patient's vision loss interferes with everyday activities, such as driving, reading or watching TV.

Discuss the implications of these technologies for society.

The implications for society of these technologies are that less people become unnecessarily blind, and have improved vision. It gives people more independence and improves their quality of life. In developing countries, cataract surgery carried out by groups such as the Fred Hollows Foundation has massive...
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