“With that out of the way,” said Mr. Kintobotnik, “we're going to learn about how we see with our eyes!”
He shrinks the SCAS down some more and flies into Anna's eye. He dodges the cells that make up her pupil to make it into her eye. Once we saw blood vessels, Mr. Kintobotnik resizes the SCAS back to the size of a flu virus.
“Welcome, class” he said, “to the inside of the eye!”
The students took pictures with their phones, but they still have the flash turned off. Mr. Kintobotnik made the SCAS face towards the window to the outer world.
“As you can see, we went through the cornea, pupil, and lens,” he taught us. “However, the SCAS had to go past the cells that build them up. Light, on the other hand, goes through them easier than we could. That's the eye's job, too.”
He pilots the SCAS to face the blood vessels again. This time, he flies it toward the vessels.
“This is the retina,” he continued. “Light hits the retina, allowing us to see. As for the blood vessels, they supply oxygen and get rid of waste.”
He flies towards the retina, and we see a bunch of cactus-esque figures.
“In case if anyone's wondering, those structures are rods and cones,” he teaches. “They are cells on the retina, and they each have their own jobs. Rods use monochrome vision in dim light, and cones detect colors and detail.”
“Monochrome vision?” asked Trixie. “What's that?”
“Monochrome vision is basically seeing something in black and white or a single color,” answered Mr. Kintobotnik.
As he answers Trixie's question, the other students take pictures of the cones and rods. They want to go in either a cone or a rod. Anna wanted the SCAS to go in the blood vessel in her eye.
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