Colors From the Eye of a Needle

On Labor Day weekend I was sitting on my front steps on Sunday morning reading in the bright, warm sunlight. As I read I noticed circles of light appearing at the side of my field of vision and I was surprised at what I saw in them. I wasn't surprised to see the circles themselves. I had often seen them when reading in bed with a night light. They are caused by light scattered from specks of seemingly ever present dust on my glasses. These point sources of light, close to the anterior focal point of the eye, cause blur circles to form on the retina.

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