On the effects of glasses on the SAR in human head resulting from wireless eyewear devices at phone call state

2018 · Harm · Low evidence

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HarmLow evidencePaper 2167

Study snapshot

Publicationmanual · 2018

Study typeengineering

Reported directionHarm

Evidence ratingLow

Abstract

On the effects of glasses on the SAR in human head resulting from wireless eyewear devices at phone call state Lan JQ, Liang X, Hong T, Du GH. On the effects of glasses on the SAR in human head resulting from wireless eyewear devices at phone call state. Prog Biophys Mol Biol. 2018 Feb 8. pii: S0079-6107(17)30082-2. doi: 10.1016/j.pbiomolbio.2018.02.001. Abstract This paper evaluates the effects of glasses on the specific absorption rates (SAR) in the human head resulting from wireless eyewear device at phone call state. We mainly concentrate on the SAR in the eyes since their sensitivity to electromagnetic fields (EMF). We find wearing glasses obviously alters the distribution and magnitude of the SAR. The maximal SAR in the ocular tissues with glasses is even 6 times more than that without glasses. Wearing glasses also induce the new hotspot in the eyes which may cause the biggest SAR increment in the ocular tissues. Moreover, calculated results indicate that the maximal SAR is sensitive to the size of glasses and radiation frequency. Because of this, we believe wearing glasses may possibly increase the risk of health hazard to eyes of wireless eyewear device user. These calculated results could be a valuable reference for the glasses designer to reduce the SAR in the eyes. ncbi.nlm.nih.gov Conclusions Based on the calculated results, we find wearing glasses obviously alters the distribution and magnitude of SAR. The maximal SAR in the ocular tissues with glasses is even 6 times more than that without glasses. Wearing glasses also could induce the new hotspot in the eyeballs which may cause the biggest SAR increment in the ocular tissues. Moreover, calculated results indicate that the maximal SAR is sensitive to the size of glasses and radiation frequency. Therefore, we believe wearing glasses may possibly increase the risk of health hazard to human eyes. In order to decrease the SAR in the ocular tissues, people should choose the adaptive glasses according to the radiation frequency. If possible, we advise people to take off their glasses when they use the eyewear device. These calculated results could be a valuable reference for the glasses designer to reduce the SAR in the eyes. However, due to the limited research conditions, the experiment is not included. So conclusions, in this paper, are just indicative but not definitive.

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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 typeengineering

Effect directionharm

PopulationHuman head (eyes/ocular tissues) model

Sample sizeNot supplied

ExposureRF

Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

Calculated results suggest that wearing glasses alters SAR distribution and magnitude in the head/eyes during wireless eyewear device use at a phone-call state. The maximal SAR in ocular tissues with glasses was reported as up to 6 times higher than without glasses, and glasses could induce a new hotspot in the eyes; maximal SAR was described as sensitive to glasses size and radiation frequency.

Outcomes measured

Specific absorption rate (SAR) in human head
SAR in eyes/ocular tissues
SAR distribution and hotspots
Maximal SAR sensitivity to glasses size and radiation frequency

Limitations

No experiment included; conclusions described as indicative but not definitive
Frequency values not specified in the abstract
Modeling/calculated results only (implied)

View raw extracted JSON

{
  "study_type": "engineering",
  "exposure": {
    "band": "RF",
    "source": "wireless eyewear device",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "Human head (eyes/ocular tissues) model",
  "sample_size": null,
  "outcomes": [
    "Specific absorption rate (SAR) in human head",
    "SAR in eyes/ocular tissues",
    "SAR distribution and hotspots",
    "Maximal SAR sensitivity to glasses size and radiation frequency"
  ],
  "main_findings": "Calculated results suggest that wearing glasses alters SAR distribution and magnitude in the head/eyes during wireless eyewear device use at a phone-call state. The maximal SAR in ocular tissues with glasses was reported as up to 6 times higher than without glasses, and glasses could induce a new hotspot in the eyes; maximal SAR was described as sensitive to glasses size and radiation frequency.",
  "effect_direction": "harm",
  "limitations": [
    "No experiment included; conclusions described as indicative but not definitive",
    "Frequency values not specified in the abstract",
    "Modeling/calculated results only (implied)"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "wireless eyewear",
    "glasses",
    "specific absorption rate",
    "SAR",
    "eyes",
    "ocular tissues",
    "hotspot",
    "radiation frequency",
    "phone call state",
    "EMF"
  ],
  "suggested_hubs": []
}

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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: 10.1016/j.pbiomolbio.2018.02.001
PubMed: Not supplied

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