You can rescue the first missing spy, who is being held on the docks. Use it to slip by the guards (you are invisible when standing perfectly still), and get inside. Go past the dogs and over the top of the locked room to free the spy.
You can only wear the chameleon suit on Spy Island.
The chameleon suit.
you don't
if you have the chameleon suit, you don't need an eye exam.
The suit is given to you by Dr. Spyglass, who runs the Spyglass Eyewear store. (He is secretly a spy scientist.) (see related question)
use the chameleon suit to get the grappling bow tie
go left to the docks and go to the roof(if you have the chameleon suit)
The Chameleon Suit, which lets you blend in with any background, can be used to slip past the guards and dogs at the Docks, so that you can rescue the first kidnapped spy. By standing still when they approach, you will not be attacked.
Don't move when the agents and dogs are looking at you.
you turn invisible by putting on the chameleon suit on and not moving
on spy island you put the chameleon suit on and go to the docks and get past the B.A.D guys and get to the door
Take the eye test. For all of them, put in the answer facing the opposite direction.