Ophthalmic instruments. Indirect ophthalmoscopes Ingestion-build-83346 ISO 28927-1 is applicable to

ISO 28927-1 is applicable to hand-held machines

when the voltage discharge value of the battery reaches the disconnecting level

acidity and ester content of ethyl acetate

sheets or tapes slit to various widths

Ophthalmic instruments. Indirect ophthalmoscopes Ingestion-build-83346 ISO 28927-1 is applicable to1 Scope This International Standard, together with ISO 15004 1 and ISO 15004 2, specifies minimum requirements and test methods for hand held, spectacle type, and head worn indirect ophthalmoscopes for observing indirect images of the eye fundus. This International Standard takes precedence over ISO 15004 1 and ISO 15004 2, if differences exist. This International Standard is not applicable to condensing lenses used for indirect ophthalmoscopy or to