you have to pay a sub to use Photoshop i.e, rent the software and Adobe is dropping parts of it like 3D so many people feel its time to move on Peny
as for how to take photos without red eye, thats down to understanding your camera settings; take it off auto and put it into speed or aperture mode... generally aperture mode is what you want for humans unless they are riding past on a horse but red eye happens when there is too much light for the image like having the flash on in sunny outside shots or if the lens is too blurry
examples of over and under blur
View attachment 40414View attachment 40415
View attachment 40416
sometimes you want the light dul or blurry in order to catch the mood but for eye shots you need to have the balance correct