Method of and apparatus for measuring the extent of clouding of

Details Method of and apparatus for measuring the extent of clouding of Method of and apparatus for measuring the extent of clouding of

1987-01-16

1989-09-05

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351246, A61B 310

Patent

active

048632619

ABSTRACT:
The extent of clouding of the lens of a human eye is measured and quantified by directing a beam of electromagnetic radiation through the iris and against the clouded portion of the lens so that the clouded portion disperses and reflects the incident radiation. A selected part of reflected radiation which makes an angle of 10.degree.-40.degree. with the beam of incident radiation is monitored for intensity by a photoelectronic transducer whose signals are transmitted to an ammeter or to a microprocessor which latter transmits modified signals to a display unit and/or to a printer. The clouded portion of the lens can be observed through an optical system with an ocular whose axis coincides with a portion of the path of incident radiation.

REFERENCES:
patent: 3600094 (1971-08-01), Liskowitz
patent: 4662731 (1987-05-01), Robert et al.

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