How do you build a Shack-Hartmann aberrometer?

• The SH-aberrometer is a specialized fundus camera.

• A conventional fundus camera focuses all light reflected by the eye into a single image of the retinal spot.

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One way to think about how the aberrometer measures the wavefront shape is to consider it a kind of fundus camera.

Unlike a conventional fundus camera, which focuses all of the reflected light into a single image of a retinal spot, ...