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Conjunctiva - Essay Example

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The conjunctiva is the membrane over the eyeball that lines the sclera (white part of the eye) and the inside of the eyelids. The membrane produces mucus, as well as tears, to deal with the myriad of objects and germs that penetrate the eye on a daily basis; this is a delicate tissue and yet it is fit to withstand particles of dust and dirt as well as certain bacteria without succumbing to infection or permanent damage…
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Download file to see previous pages The illness most frequently attributed to this part of the body is conjunctivitis, more commonly known as pink-eye, and this infection has helped researchers to understand how wearing contact lenses can affect the conjunctival capillaries: the tiny blood vessels that are responsible for the interchange of oxygen and other substances between the blood and the conjunctiva tissue.
Contact Lens Papillary Conjunctivitis, or CLPC, is the most common reasons for contact lens wearers to discontinue their usage of lenses. This infection has been directly attributed to the use of contact lenses and in studies using control groups of non-lens wearers it became clear that wearing contact lenses changes the condition of the conjunctival capillaries and therefore the overall condition of the conjunctiva. Studies conducted by Australian researchers showed that while wearing a contact lens, users are reducing the tear and mucus flow under the contact itself, therefore inhibiting the cleansing fluids produced by the conjunctiva from essentially washing away dirt and bacteria. Where the conjunctival capillaries were concerned, the researchers noted a decrease in perfusion, meaning that the capillaries were under pressure and therefore unable to function properly. The compression of the conjunctival capillaries is something that researchers wanted to understand better, in relation to how exactly it affected each lens wearer as opposed to non-contact lens wearers (Augusto et al, 2002).
The conjunctiva relies on working capillaries just as any other tissue within the body so that oxygen can reach it and provide proper nutrition. This is the essential circulation of materials from the bloodstream to the tissue that occurs all throughout the body, and needless to say the medical and scientific community is interested in understand just how this basic circulation is affected by the presence of a contact lens. Because lenses slow the conjunctival circulation process, eye-care specialists have been vigilant in monitoring their patients to see whether this will have any adverse effects. Certainly most contact lens wearers have reported dry eyes and this has been countered with the use of special eye-drops designed to keep the eye moist in place of properly working conjunctival capillaries.
Normally, conjunctival blood cells will mimic that of the rest of the body, however given extensive contact lens use and the susceptibility to conjunctivitis, the presence of white blood cells within the area is often higher than in a non-contact lens wearer. Basically, people who wear contact lenses have to deal with the fact that their conjunctiva is compressed and that the conjunctival capillaries are in turn compressed and unable to supply blood to the membrane in a normal manner. This in turn promotes the build up of bacteria and dry eyes, which will subsequently call for the production of more white blood cells through the capillaries which are used for healing infections and ridding the membrane of harmful bacteria.
Researchers studying CLPC noticed that lens wearers with the infection, opposed to wearers without the infection, showed no significant differences in the build-up of conjunctival capi ...Download file to see next pagesRead More
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Teaching Plan

... effects of the disease when it reaches the chronic stage. 5. Bring their pill box to indicate the effectiveness in dosage and demonstrate their understanding of its importance In conclusion, conjunctivitis is common among children and can be a source of great discomfort. Caregivers should learn to seek medical attention immediately once their infants show abnormal signs to avoid adverse effects like blindness and ensure that full treatment is attained. Works cited Gigliotti Wiliams, Acute conjunctivitis of childhood. Pediatr Ann 1993;22: 353–356. Spraul Christopher, Lang GK, Allergic and atopic diseases of the lid, conjunctiva and cornea. Curr Opin Ophthalmol 1995;6:21–6....
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