Upper level: b210  Seeing functions

b2102  Quality of vision

Seeing functions involving light sensitivity, colour vision, contrast sensitivity and the overall quality of the picture.

(additional explanation: Visual function including quality of optical receptivity, color vision, contrast sensitivity, and the overall image. )

Lower livel:

• b21020  Light sensitivity

• b21021  Colour vision

• b21022  Contrast sensitivity

• b21023  Visual picture quality

• b21028  Quality of vision, other specified

• b21029  Quality of vision, unspecified

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