I have to really control lighting, even with a makeshift studio setup and macro lenses, to get decent media shots. But even then .... that reflection. Hard to do.
Those are defects in the pressing material. I try to get an exchange, when it's from a store.
If exchange/replacement is not possible...
You would be wise to make backup copies of these discs, a 1:1 to Verbatim DVD+R DL media. Several methods will work, but I find the best one is
AnyDVD + ISO Puzzle. (Or just ISO Puzzle if there is no "copy protection" present.)
DVD Decrypter often works, but it really depends on the aggressiveness, age and presence of CSS encryption. (NOTE: I don't support people who copy discs they don't own, but I also don't support shoddy products. Just another valid reason people need to be able to copy media.)
This assumes all your CDs / DVDs are pressed retail releases, not DVD-R/CD-R releases (official or unofficial). If these are recordables, then it's just shoddy media with dye layer errors. I see those, too -- especially from B-grade junk re-branded/overprinted in UK.