My input - it's less important that the ability itself is unique than it is whether you're capable of finding unique and creative ways to use it. Regarding this specific power, yes it's not a power I see very often and it does have potential to be used in a multitude of ways, but if the only way you show it being used is "They suckerpunched me, because I thought they over there, but they were really right in front of me," then it'll get stale. Not saying that's your only idea for it, but it's something you need to keep in mind, especially when it's not an inherently flashy or exciting power (for example, Dragon Ball gets a lot of mileage out of "shoots energy out of hands" because it's fun to watch no matter how often they do it).
For an analogy, there's an unofficial "creativity test" where you're given a normal brick and asked to list as many uses for it as possible. Lets say, instead, this is a character who has complete control over a single brick. Sounds boring, right? And it will be boring if the author only ever has them use the "bludgeon bad guy with a brick" technique. But what if they could ride the brick to fly? Or what if they can deconstruct the brick and reassemble it into different shapes? The more ways you can twist your mind to make this single, limited superpower work, the more likely your audience will want to tune in next time to see what crazy use you come up with next.
If anyone here is familiar with the Stands in Jojo's Bizarre Adventure, you can see how powers that seem very specific and constrained can produce a number of interesting scenarios you haven't considered before.
As for my last point, the name. I'd say "Light Manipulation" is too general, because there's a huge variety of things you can do with light. If this character can only manipulate light in this very specific manner (slowing it down as it enter's someone's eye) then a more specific name would be more appropriate. I'm not feeling especially creative right now, but "Light Slowing" or "Perception Slowing" would be more informative, though not very cool sounding.