Wear tri-focal have catehat eracts need for fine print what power?

The power you need is the same as in the lower (reading) section of your trifocals. Should be on your prescription for the trifocals. If not, just ask your ophthalmologist. Note that these reading glasses will not compensate for any blurriness due to your cataracts - only cataract removal and lens implants can do that. Most people who have had the cataract surgery lose their near vision and, hence, these reading glasses will be needed.

I need different strength lenses for different eyes. Is it easy to pop out one lens and replace with another?

no, each set of reading glasses are all different sizes. one does not fit in another. if you pop out the lenses, they will always pop out when you don't want them to. the lenses are sealed in the frames for a reason. reading glasses are cheap. just buy another pair if they aren't right.

Is there any way to fix them if they are crooked? Mine are comletely tilted as the arms are not straight.

Hello! I don't know that there is a solution because it would mean replacing the arms, you may as well purchase another pair for what the cost would probably be. If they are still within the return timetable, I would suggest returning and purchasing a new pair. You could try dipping the arms in very hot water to soften a little and then gently straightening them. Just a suggestion. GB

Reviews say Multi color is not as pictured. Does the color vary, or is it always light pink, rather than mix of rose, burgundy, pink, green & orange?

My pair of multi color is just as pictured. It is a mix of all those colors you mentioned. The colors do not vary. I love my pair. The variety of color is not only unique but they are the most comfortable pair of reading glasses I have ever purchased especially when you read laying down.