自我评估白内障摘除术后良好视功能的持续时间:一项长期研究

Duration of self assessed benefit of cataract extraction: A long term study

Aim: To investigate how long patients’improved visual function lasts after a cataract extraction. Methods: Patients’self assessed visual function was evalua ted using the Catquest questionnaire both before and 6 months after a cataract e xtraction. The study population consisted of 615 patients undergoing a cataract extraction during 1995-2002. A final follow up with a new questionnaire was per formed in 2003, between 1 year and 8 years after surgery. Results: 445 (72.4%) patients were alive at follow up and agreed to participate in the study. The num ber of subjects still showing improved visual function after surgery decreased w ith longer follow up. After 7 years, 80%had improved visual function compared w ith before surgery. 50%of all originally operated subjects were alive 7 years p ostoperatively and enjoyed better visual function than they had done before surg ery. Ocular co-morbidity in the operated eye or self assessed poor visual funct ion before surgery was significantly related to deteriorated visual function at follow up. Conclusion: The number of subjects who experienced improved visual fu nction after a cataract extraction decreased over the course of time postoperati vely. Presence of ocular co-morbidity was significantly related to worsened fun ction.