Can I use earphones/headphones?

5 years back, I had my tympanoplasty surgery of my right ear. I used to have frequent ear infections and fluid drain from my right ear before the surgery but it pretty much stopped after the surgery. I had like 60% hearing loss before which improved to 30% right after 2 months of the surgery. Yet I can feel significant difference in the hearing capacity of my right ear from my left one (which happens to be totally fine). But, everything is fine and normal because my ruptured eardrum has been totally fine and healed for so long... I desire to use earphones ( neither excessively nor at high volume) but my parents believe it is still harmful. Is it fine if I use earphones or headphones? If yes then what could be the possible limitations?