摘要
目的 观察现代囊外白内障术中显微镜光照对视网膜功能的影响。方法 应用国际标准化视网膜电流图 (F- ERG)记录 45例 45眼白内障术前及 (白内障囊外摘出 )术后1m o F- ERG最大反应 (MCR) (a、b波振幅 )。按 (WHO)晶状体混浊度分级采用不同术式 ,A组 PHACO术、B组 ECCE术。 A组术中实际曝光于显微镜下 2 5～ 40 m in(31.4min±4.1m in) ,中度光强 ;B组 5 0～ 75 min(5 9.8m in± 8.7m in) ,中高度光强。比较 2组中使用不同显微镜光照 (时间和光强 )对 ERG反应的影响 ,评价其对视网膜功能的损害。结果 白内障术后 1m o F- ERG a、b波振幅较术前均有不同程度的增大 (0 .0 1<P<0 .0 5 ) ;A组术后 F- ERG振幅较术前明显增大 (P<0 .0 1) ;B组较术前增大 ,但无显著性差异 (0 .0 1<P<0 .0 5 )。结论 白内障术后 ERG反应有不同程度的增强 ,提示晶状体混浊可减弱 ERG反应 ;显微镜光照下手术时间越长、光照越强 ,术后 1mo F- ERG反应增幅越小 。
Objective To observe the influence of microscopic light illumination on the retinal function during the cataract extraction surgery Methods Applying the standardized F ERG recording technique to measure the amplitude of a wave and b wave of the maximal combined response(MCR) of F ERG in 45 cases(45 eyes) of cataract patients pre operation and post operation According to different lens opacity (as WHO classification) different operative methods (group A PHACO, group B ECCE)are used The exposuring time under microscope light in group A was 25~40min(mean 31 4min±4 1min), the light intensity was moderate, whereas the exposuring time in group B was 50~75min(mean 59 8min±8 7min), the light intensity was moderate to high Comparing different microscopic light illumination(time and intensity)with ERG response to evaluate its damage to the retinal function Results The amplitudes of a wave and b wave one month post operation are larger than those of pre operation;The amplitude of F ERG in group A post operation is significantly larger than that of pre operation ( P <0 01);In group B it was somewhat larger than it was post operation(0 01< P <0 05) Conclusions ERG response of cataract eyes will be increased in various degrees post operation, which suggests that lens opacity can reduce the response; The longer the operation and the exposure time spent under microscope light, the lower the F ERG response gets 1 month post operation We can come to the conclusion that continuous surgery under microscopic light illumination can induce the retinal light damage
出处
《眼科新进展》
CAS
2001年第2期89-91,共3页
Recent Advances in Ophthalmology
基金
上海市医学领先专业特色专科科研基金资助
