Are there any conditions other than macular degeneration that cause lines to look wavy in your vision?

Yes, many. The most common condition that may cause wavy vision might be a macular pucker. Others include central serous chorioretinopathy, drusen in the macula, macular hole, etc. Best to get an exam with an eyemd!
Yes. There are many: cystoid macular edema, macular hole, macular pcuker, diabetic macular edema, central serous retinopathy, vitelliform maculopathy, macular dystrophy, stargardt disease, among many others. See a retina specialist.
Several thi ngs. Having these types of symptoms can best be solved by having your doctor perform a thorough evaluation. Only through this type of process can he/she discover what's going on and how best to help you.