4204
METHODS : Standard pattern electroretinograms ( P - ERGs ) and standard pattern visual evoked potentials ( P - VEPs ) were done in 25 eyes of 25 patients who had myopic PRK for an attempted correction between 5 . 00 and 15 . 00 diopters ( D ) ( mean 8 . 00 D ) .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 None