Experimental cataract produced by 3 cm. pulsed microwave irradiations

AMA Arch Ophthalmol · 1951 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 6703

The abstract states that cataract development from electromagnetic radiation is established and notes prior work demonstrating that lenticular opacities could be produced by continuous microwave radiation at 12.25 cm wavelength. The provided abstract excerpt …

Study snapshot

PublicationAMA Arch Ophthalmol · 1951

Study typeanimal

Reported directionUnclear

Evidence ratingInsufficient

Abstract

THE DEVELOPMENT of cataract as a result of electromagnetic radiations is well established. Formerly it was supposed that this effect was unique to the action of infra-red, ultraviolet and roentgen radiations, although as early as 1926 in a survey of work in these fields Duke-Elder1 suggested that other portions of the spectrum, if of sufficient magnitude, might produce cataract. On the other hand, as late as 1944 it was the opinion of Bellows,2 basing his views on the work of Legge3 and of Hartridge and Hill,4 that electromagnetic waves longer than 20,000 angstrom units would be absorbed completely by the cornea. In 1948 it was demonstrated by Richardson, Duane and Hines5 that lenticular opacities could be produced by continuous microwave radiations of 12.25 cm. wavelength. These observations were confirmed by the contemporary work of Daily, Wakim, Herrick and Parkhill,6 which was completed later in

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeanimal

Effect directionunclear

PopulationNot supplied

Sample sizeNot supplied

Exposuremicrowave

Evidence strengthInsufficientConfidence: 46% · Peer reviewed: yes

Main findings

Outcomes measured

cataract
lenticular opacities

Limitations

Abstract excerpt is incomplete and does not provide methods, exposure parameters (e.g., power/SAR, duration), sample size, or results for the 3 cm pulsed microwave condition.
Frequency for 3 cm wavelength exposure is not stated in the excerpt.

View raw extracted JSON

{
  "study_type": "animal",
  "exposure": {
    "band": "microwave",
    "source": null,
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "cataract",
    "lenticular opacities"
  ],
  "main_findings": "The abstract states that cataract development from electromagnetic radiation is established and notes prior work demonstrating that lenticular opacities could be produced by continuous microwave radiation at 12.25 cm wavelength. The provided abstract excerpt does not report specific results for 3 cm pulsed microwave irradiation.",
  "effect_direction": "unclear",
  "limitations": [
    "Abstract excerpt is incomplete and does not provide methods, exposure parameters (e.g., power/SAR, duration), sample size, or results for the 3 cm pulsed microwave condition.",
    "Frequency for 3 cm wavelength exposure is not stated in the excerpt."
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.46,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "cataract",
    "lenticular opacities",
    "microwave radiation",
    "pulsed microwave",
    "3 cm wavelength",
    "ophthalmology"
  ],
  "suggested_hubs": [
    {
      "slug": "rf-cataract",
      "weight": 0.78,
      "reason": "Focus is on cataract/lenticular opacities associated with microwave (RF) irradiation."
    }
  ]
}

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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1001/archopht.1951.01700010390004
PubMed: 14818493

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