It might also qualify for design patent protection for the actual eyewear. Your works are protected by copyright as soon as you set them down in tangible form though registration gets you additional protections (and you'd need that before heading to court anyhow). Similarly you get trademark rights by using your brand in commerce, and again registration gets you added protections.
As stated, an IP lawyer will help you protect yourself. Further, if by "eyewear" you mean something like sunglasses rather than just selling frames to other providers, you may wish to consult a industry-specific legal advisor about making sure you comply with the standards for impact/shatter resistance. Even without a legal requirement to do so, it would probably behoove you to do so from a liability standpoint. The case law is against you on that point.