Visual function and retinal vessel diameters during hyperthermia in man

Jensen, Bettina Hagström; Bram, Thue; Kappelgaard, Per; Arvidsson, Henrik; Loskutova, Ekaterina; Munch, Inger Christine; Larsen, Michael

doi:10.1111/aos.13361

Cited by 5 publications

(1 citation statement)

References 39 publications

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“…The authors concluded that increased core body temperature was associated with improved temporal visual resolution and retinal trunk vessel dilation. These findings suggest that hyperthermia is associated with enhanced retinal function and increased retinal metabolism [94].…”

Section: Environmentmentioning

confidence: 76%

Assessing Critical Flicker Fusion Frequency: Which Confounders? A Narrative Review

Muth

Schipke

Brebeck³

et al. 2023

Medicina

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The critical flicker fusion frequency (cFFF) refers to the frequency at which a regularly recurring change of light stimuli is perceived as steady. The cFFF threshold is often assessed in clinics to evaluate the temporal characteristics of the visual system, making it a common test for eye diseases. Additionally, it serves as a helpful diagnostic tool for various neurological and internal diseases. In the field of diving/hyperbaric medicine, cFFF has been utilized to determine alertness and cognitive functions. Changes in the cFFF threshold have been linked to the influence of increased respiratory gas partial pressures, although there exist inconsistent results regarding this effect. Moreover, the use of flicker devices has produced mixed outcomes in previous studies. This narrative review aims to explore confounding factors that may affect the accuracy of cFFF threshold measurements, particularly in open-field studies. We identify five broad categories of such factors, including (1) participant characteristics, (2) optical factors, (3) smoking/drug use, (4) environmental aspects, and (5) breathing gases and partial pressures. We also discuss the application of cFFF measurements in the field of diving and hyperbaric medicine. In addition, we provide recommendations for interpreting changes in the cFFF threshold and how they are reported in research studies.

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Section: Environmentmentioning

confidence: 76%