Journal of Research in Medical Sciences1735-199514520090609Prophylactic ophthalmic bethametazone for sulfur mustard-induced ocular Injury291295ENMostafaNaderiResearch Center for chemical injuries, Baqiyatallah University of Medical Sciences. Mostafa.Naderi@gmail.comGholam RezaKakaKhosroJadidiHamid RezaKhoddami VishtehNavvabShamspourdSeyed-HomayounSadraieb200812302009060920090608BACKGROUND: The present study sought to evaluate the prophylactic effect of bethametazone on sulfur mustard (SM)- induced ocular morphometric damage in the rabbit eye.METHODS: Twenty five healthy New Zealand white rabbits were divided into 4 groups of normal (not exposed to SM or solution), solution (exposed to solution), SM (exposed to SM), and prophylactic bethametazone (received eye solution of bethametazone then exposed to SM solution; then treated for 2 weeks). On the day 14 after exposure, five-micron sections were stained with haematoxylin and eosin for light microscopy valuation. The ocular morphometric characteristics in the study groups were compared to determine the prophylactic effects of the   ethametazone.RESULTS: Bethamethazone could protect eyes from SM effect by means of decrease in changes in number of Keratocyte in 10000 μm2, thickness of cornea (μm), thickness of corneal epithelium (μm), number of meibomian gland's cells in 2500 μm2, thickness of palpebral conjuctival epithelium (μm), thickness of epithelial of palpebral skin (μm), number of epithelial layers of palpebral skin, and number of goblet cells in conjunctival sac in 1000 μm.CONCLUSIONS: Bethametazone may have a prophylactic effect on the early lesions of the eye of the rabbit due to SM exposure.KEYWORDS: Betamethasone, Sulfur Mustard, Ocular Lesions.