الفهرس Only 14 pages are availabe for public view
 |  | from | 164 |  |  |
| | | from | 164 | | |
Abstract
Contact lens contamination is usually airborne.But also may be from the unclean fingers , nails or contact with skin grease and cosmetics. The factors that lead to contamination and active infection include poor ocular hygiene, lower ocular defense, opportunistic microbial invasion, inadequate disinfection, contaminated wetting or cleaning solutions, loose contact lens containers and changes in the surface of the lens by aging and handling procedures (Wilson et al ., 1971 and Tripathi et al ., 1978)
Infection was found to be more common in those who find difficulty in inserting or removing their lenses as this may lead to abrasions, (Abedel Fatah et al ., 1990).
Several factors may have contributed to the occurrence of infection in the healthy patients wearing contact lenses, and many factors could also cause change of the normally present non pathogenic organisms to pathogenic. The abuse of lens solutions and the improper contact lens hygiene are common causes for the occurrence of infection. (Harbans, et al ., 1990).
The adherence of microbial biofilms onto the contact lens surface and their relative resistance to antibiotics and antiseptics has also been reported (Wilson et al., 1990-1991, Anwar, et al., 1992).
The aim of the work
The present work is directed to review the nature of different contact lens pollutant either organic or inorganic and to determine the methods of preventing contact lens contamination .Hence the contact lens related hazards may be eliminated or reduced.
References
1- Fowler SA and Allansmith MR (1980): Evolution of soft contact lens coatings Arch Opathalmol: 98:95-99.
2- Wedler F and Horensky D (1987): Analysis of protein and mucin components deposited on soft hydrophilic contact lenses. Clin . Exp. Optom. 70: 59.
3- Staplton F, Dart JKG, Minassian D (1993): Risk factor with contact lens related suppurative keratitis. Contact lens Association of Ophthalmologists Journal; 19:204-210.
4- Gray TB, Gross KA, Cursons RT, Shewan J (1994): Acanthamoeba keratitis. A sobering case and a promising new treatment. Aust NZ J Opthalmol: 22: 73-76.
5- Wilson L A and Kuchne JW(1971): Microbial contamination in ocular cosmetics ;Am J Opthalmol 71: 1298.