Eastman Kodak Co.'s board of directors has elected two new vice presidents: Jaime Cohen Szulc, regional business general manager of the Latin America Region in the Consumer Imaging organization, and Mark A. Schneider, chief technology officer for Consumer Imaging.   . . .   Kathryn E. Falberg and Gary S. Petersmeyer have been elected to the board of VISX, developer of refractive laser technology.