Adjusting for age at time of surgery , gender , interval between preoperative and postoperative visits , and type and severity of cataract , the mean changes in visual acuity were as follows : eyes with mild AMD ( n = @ ) gained @ letters ( @ % confidence interval -LSB- CI -RSB- , @-@ @ ) , eyes with moderate AMD ( n = @ ) gained @ letters ( @ % CI , @-@ @ ) , eyes with severe AMD ( n = @ ) gained @ letters ( @ % CI , @-@ @ ) , eyes with noncentral geographic atrophy ( n = @ ) gained @ letters ( @ % CI , @-@ @ ) , and eyes with advanced AMD ( central geographic atrophy , neovascular disease , or both ; n = @ ) gained @ letters ( @ % CI , @-@ @ ) .