P applied for certification as a peace officer from D. P was denied certification because his eyesight did not meet the minimum standards. P's distance vision in his left eye does not meet the standards of 501 Iowa Administrative Code 2.1(9), which requires uncorrected vision of 'not less than 20/100 in both eyes, corrected to 20/20.' D determined that P did not meet the vision criteria of the rule and therefore could not be certified. D interpreted rule 2.1(9) to require 20/20 corrected vision in each eye. P’s certification was denied without a hearing. P appealed the denial in district court which dismissed P’s petition. P appealed.