The maximal absolute drop in corneal sensitivity as measured by pressure thresholds was greatest for diclofenac [ 28.6 mm ( 95 % confidence intervals { CI } , 19.8-37 .4 ) ] , followed by ketorolac [ 21.1 mm ( 95 % CI , 15.1-27 .1 ) ] , bromfenac [ 16.9 mm ( 10.7-23 .1 ) ] , and nepafenac [ 16.4 mm ( 95 % CI , 12.7-20 .1 ) ] .