SYNOPSIS
Maddie visits an opticians to see how eye tests work, and learns how a camera can take a picture of the back of our eyes to see that they are healthy. She then learns how the frames of glasses are made by shaping gold wire.
Maddie visits an opticians to see how eye tests work, and learns how a camera can take a picture of the back of our eyes to see that they are healthy. She then learns how the frames of glasses are made by shaping gold wire.
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