disease of the lens分析课件

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1、DiseaseofthelensAnatomyandPhysiologyofthelensPosition:Thelensconnectedwiththeciliarybodybythesuspensoryligamentthatfixesitbehindtheiris,infrontofthevitreousbody.suspensory[səspensəri]悬吊式；悬带adj.悬吊的；暂时中止的；支持的ligamentlɪgəmənt]韧带；纽带，系带vitreous.玻璃的；玻璃状的；玻璃似的][vɪtri:əs]Anatomy:Thelenscapsuleisalayerof

2、elastichomogeneousmembrane.Thelensfibersaretheextensionandelongationforwardsandbackwardsoftheepithelialcellsattheequator.Anatomy[ənætəmi:]capsule[ˈkæpsju:l]elastic[iˈlæstik]homogeneous[ˌhɔməˈdʒi:njəs]均匀的membrane.[ˈmemˌbreɪn]elongation[ɪˌlɔ:ŋˈgeɪʃən延长epithelialcells[ˌepiˈθi:ljəl]上皮的equator.[iˈkwe

3、itə]赤道Itisabout9mmindiameterand4-5mminthethickness.Butweonlyuse2.5-4mminthecenter(becausetheiriskeepsouttherestlensandonlycanviewsthecenterportionthroughthepupil.)pupil.)[ˈpju:pəl]Thelensiskindoftransparentandnon-bloodvasculartissue.Itisanimportantpartofrefractivemediaoftheglobe.Thelens’nourishm

4、entareofferedbyaqueoushumor.Physiology[ˌfɪzi:ˈɔlədʒi:]vesseltissue.[ˈvesəl]血管refractive[riˈfræktiv].折射的globe.[ɡləub]nourishment[ˈnʌriʃmənt]营养品aqueous[ˈeikwiəs]humor.ˈhju:mə]房水Physiology:whatisacataract?Thedisorderofthelenscommonlyiflossofitstransparencycaninduceseverevisualdisturbance.(cataract)

5、.commonly[ˈkɔmənlɪ]transparency][trænsˈpeərənsi这种紊乱的镜头通常如果失去它的透明度(白内障)和异常的位置,都能引起严重的视力障碍。CataractisthefirstcauseofblindnessinChinaandothermanydevelopingcountry.Thereareonemillionofcataractsuffererwhoareinneedofoperationtorestoretheirvisions.blindness[ˈblaɪndnɪs]sufferer[ˈsʌfɵrə]restore[riˈstɔ:]C

6、lassificationCongenitalcataractAge-relatedcataractTraumaticcataract:bluntorpenetratinginjuryComplicatedcataract:uveitisMetaboliccataract:diabetesDrug-inducedortoxiccataractDevelopingcataractAfter-cataractCongenitalcataract(kənˈdʒenɪtl]Age-relatedcataract(senile)Traumaticcataract[trɔ:ˈmætɪk]:blun

7、t钝的[blʌnt]orpenetrating[ˈpenɪˌtreɪtɪŋ]敏锐的injuryComplicatedcataract:uveitis[ˌju:viˈaitis]葡萄膜炎Metaboliccataract[ˌmetəˈbɔlik]:diabetes[ˌdaɪəˈbi:tɪs,Drug-inducedortoxiccataract[ˈtɔksik]SymptomsBlurringordimnessofvisioncolorsappe