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optophone

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optophone

a device combining a selenium cell and telephone apparatus that converts light energy into sound energy, used to enable blind people to sense light through the hearing and thus read printed matter.

See also: Blindness

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optogram
optography
optology
Optometer
optometrist
optometry

optophone
optotechnics
optotype
opulence
Opulency
opulent
opulently
opuntia

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