The effects of microwave radiation on rabbit's retina

PAPER manual 2018 Animal study Effect: mixed Evidence: Low

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Abstract

The effects of microwave radiation on rabbit's retina Mohammad R. Talebnejad MR,Sadeghi-Sarvestani A, Hossein Nowroozzadeh M, Mortazavi SMJ, Khalili MR.The effects of microwave radiation on rabbit's retina. Journal of Current Ophthalmology. 30(1):74-79. Mar 2018. Purpose Mobile cell phones are used extensively these days, and their microwave (MW) radiation has been shown to affect the eye. The purpose of the present study was to evaluate the effects of MW radiation on rabbit retina. Methods This experimental study (concluded in 2015) was conducted on 40 adult white New Zealand rabbits. A Global System for Mobile Communications (GSM) cell phone simulator was used for MW irradiation. The rabbits were randomized into five groups (8 in each) and treated as follows: Group 1: no irradiation (sham); Group 2: irradiation at 10 cm for 1 day; Group 3: irradiation at 30 cm for 1 day; Group 4: irradiation at 10 cm for 3 days; and Group 5: irradiation at 30 cm for 3 days. Scotopic and photopic electroretinography (ERG) responses were obtained at baseline and 7 days after the last exposure. Then all the rabbits were euthanized, and their eyes were enucleated and sent for pathology examination. Kruskal-Wallis and Chi-Square tests were used to evaluate intergroup differences in ERG parameters and histological findings, respectively. Results ERG responses obtained 7 days after irradiation did not show any statistically significant difference between the groups (P > 0.1, for all tested parameters). There were statistically non-significant trends toward greater changes in the MW irradiated eyes. In pathological examination, retina was normal with no sign of degeneration or infiltration. Ciliary body congestion was observed in greater fraction of those who received higher MW doses. (P = 0.005). Conclusions Histopathologically, cell phone simulated MW irradiation had no significant detrimental effect on the retina. However, ciliary body congestion was observed in greater fraction of those who received higher MW doses. Although there was no significant difference between post-treatment mean ERG values, there were statistically non-significant trends toward greater changes in the MW irradiated eyes. ac.els-cdn.com b681-a67c72fb8ce7&acdnat=1521759969_87729ccbd7b1a4e21078c03d443000be

AI evidence extraction

At a glance

Study type

Animal study

Effect direction

mixed

Population

Adult white New Zealand rabbits

Sample size

Exposure

microwave mobile phone (GSM) simulator · 1 day or 3 days exposure; outcomes assessed 7 days after last exposure

Evidence strength

Low

Confidence: 78% · Peer-reviewed: yes

Main findings

ERG responses 7 days after irradiation showed no statistically significant differences between groups for tested parameters (P>0.1). Retinal pathology was reported as normal with no degeneration or infiltration, while ciliary body congestion occurred in a greater fraction of higher-dose groups (P=0.005).

Outcomes measured

Scotopic electroretinography (ERG) parameters
Photopic electroretinography (ERG) parameters
Retinal histopathology (degeneration/infiltration)
Ciliary body congestion (pathology)

Limitations

Microwave exposure parameters (e.g., frequency, SAR, output power) not reported in the abstract
Short follow-up (ERG measured 7 days after last exposure)
Animal model; generalizability to humans unclear

View raw extracted JSON

{
    "study_type": "animal",
    "exposure": {
        "band": "microwave",
        "source": "mobile phone (GSM) simulator",
        "frequency_mhz": null,
        "sar_wkg": null,
        "duration": "1 day or 3 days exposure; outcomes assessed 7 days after last exposure"
    },
    "population": "Adult white New Zealand rabbits",
    "sample_size": 40,
    "outcomes": [
        "Scotopic electroretinography (ERG) parameters",
        "Photopic electroretinography (ERG) parameters",
        "Retinal histopathology (degeneration/infiltration)",
        "Ciliary body congestion (pathology)"
    ],
    "main_findings": "ERG responses 7 days after irradiation showed no statistically significant differences between groups for tested parameters (P>0.1). Retinal pathology was reported as normal with no degeneration or infiltration, while ciliary body congestion occurred in a greater fraction of higher-dose groups (P=0.005).",
    "effect_direction": "mixed",
    "limitations": [
        "Microwave exposure parameters (e.g., frequency, SAR, output power) not reported in the abstract",
        "Short follow-up (ERG measured 7 days after last exposure)",
        "Animal model; generalizability to humans unclear"
    ],
    "evidence_strength": "low",
    "confidence": 0.7800000000000000266453525910037569701671600341796875,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "microwave radiation",
        "GSM",
        "mobile phone simulator",
        "rabbit",
        "retina",
        "electroretinography",
        "histopathology",
        "ciliary body congestion"
    ],
    "suggested_hubs": []
}

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

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