Pre-operative Visual Acuity For Age-related Cataract Surgery Between2000and2010

Objective: Compared to2000, Chinese aging population increased from7%to8%in2010. The population of age-related cataract was increasing year by year.Vision wasthe most important indicator of cataract surgery. Chinese cataract rate was270in1999and796.2in2010. The number of cataract surgery increased three times between2000and2010. But the visual indication for cataract surgery was still0.3and less in decimalrecord methods from2000to2010, especially in the subsidy cataract surgery for poorpatients.The aim was to explore if there was difference in visual acuities at the pre-operative visit for cataract patients who need cataract surgery between2000and2010.The investigation proceeded in He EYE HOSPITAL in Shenyang China.Methods: All pre-operative visual acuities of cataract patients in October,November, December2000and2010were evaluated yielding a total of388eyes (316first eye surgeries and72second eye surgeries). Information was drawn from operationrecords regarding all cataract surgeries (except for congenital and childhood cataract,traumatic cataract, complicated cataract, Lens dislocation, et al). Only second eyes thatwere operated on within one year of the first eye surgery done were included in thesecond eye analyses.Results: Compared to2000, the pre-operative visual acuity in first eye wasincreased significantly in2010（P=0.004）, and there was no difference in the second eye.The distribution of the pre-operative visual acuity was different in the first eye.Butthere was no difference in the second eye. Compared to2000, the fourth level blindnessof pre-cataract surgery patients significantly decreased from55%in2000to36%in2010in the first eye, and the third level blindness of pre-cataract surgery patients significantly increased from5%in2000to13%.The first level low vision increasedfrom18%in2000to29%in2010.There was no difference in the second level lowvision and vision is equal to0.3or more. The mean age of patients receiving cataractsurgery increased from66.73years in2000to69.99years in2010in the first eye(P=0.010). And there was no difference in the second eye. The mean age of patientsincreased from64.80years in2000to69.70years in2010in males in the firsteye(P=0.02). But there was no Statistical significance in females.The distribution of cataract surgery age was different between2000and2010inthe first eye. The percent of75years and more increased significantly, and the percentof65to74years decreased significantly.There was no difference in the pre-operative visual acuities between males andfemales in the first eye and in the second eye.The was no correlation between pre-operative visual acuities and ages in the firsteye and in the second eye.The pre-operative visual acuity was relevant to patients with other eye diseases inthe first eye,but not second eye.Conclusion: Compared to10years ago, the pre-operative visual acuity forcataract surgery increased from2000to2010, and more old patients was performedcataract surgery in China.