scholarly journals Seeing is believing: a demonstration of critical fusion frequency and its multidimensional nature

2017 ◽  
Vol 41 (2) ◽  
pp. 315-319
Author(s):  
Gnanasenthil Ganesh ◽  
Sathish Mahalingam ◽  
Gayatri Annamalai ◽  
Umadevi Damodharan
Keyword(s):  
Fusion Frequency ◽  
Critical Fusion Frequency

Neurobehavioral Effects of β-Escin

2019 ◽  
Vol 8 (1) ◽  
pp. 79-86
Author(s):  
Huda J. Waheed ◽  
Saad B. Nashtar ◽  
Ali I. Al-Gareeb ◽  
Hayder M. Al-Kuraishy
Keyword(s):  
Healthy Volunteers ◽  
Term Therapy ◽  
Horse Chestnut ◽  
Cortical Arousal ◽  
Short Term ◽  
Fusion Frequency ◽  
Insignificant Effect ◽  
Sensorimotor Reaction ◽  
Critical Fusion Frequency ◽  
Neurobehavioral Effects

Background: Aescin or β-escin is the main and active constituent of horse chestnut seed (Aesculus hippocastanum) used for the treatment of inflammatory edema, venous insufficiency and ischemic ulcerations. Aescin has many actions due to induction of endothelial nitric oxide and prostaglandin F2-α production moreover; aescin antagonizes the effect of histamine and 5HT at receptor levels. </P><P> Objective: The aim of the present study was to evaluate the neurobehavioral effects of aescin on normal healthy volunteers. </P><P> Method: A total number of 65 healthy participants with mean age of 21+1.1 years were recruited to study the effects of aescin on the neurobehavioral effects of normal healthy volunteers compared to placebo. The neurobehavioral effects were assessed by psychomotor performances and sensorimotor reaction, cortical arousal and central integrity processes and assessment of memory capacity. Results: Placebo produced insignificant amelioration of TRT and RRT p>0.05, with mild significant effect on MRT p=0.03. Aescin produced a significant effect in the amelioration of psychomotor performances and sensorimotor reaction p=0.0001. Regarding the differential effect of placebo and aescin on the cortical arousal and central integrity processes, placebo illustrated insignificant effect at p>0.05 whereas; aescin showed mild significant effect on Critical Fusion Frequency (CFFA) p<0.05 and highly significant effect on the other parameters p<0.01 except for critical-fusion frequency threshold when aescin illustrated insignificant effect at p>0.05. Aescin illustrated significant acceleration of ІІ-back WMA, ІІІ-back WMA and Second trial Short-Term Memory (STM) at p<0.01 compared to the placebo effect. Conclusion: Short-term therapy with aescin improves the neurobehavioral effects on healthy volunteers.

Comparison of critical fusion frequency in diurnal and nocturnal retina of vertebrates

1962 ◽  
Vol 70 (5) ◽  
pp. 660-670 ◽  
Author(s):  
G. P. M. Horsten ◽  
J. E. Winkelman ◽  
M. H. Smits ◽  
H. T. Penso
Keyword(s):  
Fusion Frequency ◽  
Critical Fusion Frequency

Visual Fatigue Caused by Tablet PC Based on Critical Fusion Frequency and Eye Blink Frequency

2013 ◽  
Vol 401-403 ◽  
pp. 544-547 ◽  
Author(s):  
Cheng Ming Chen ◽  
Hui Wang ◽  
Yong Tang ◽  
Xun Zhang
Keyword(s):  
Living Environment ◽  
Subjective Rating ◽  
Visual Fatigue ◽  
Tablet Pc ◽  
Fusion Frequency ◽  
Eye Blink ◽  
Tablet Pcs ◽  
Before And After ◽  
Critical Fusion Frequency ◽  
Blink Frequency

The objective of the study is to evaluate visual fatigue induced by different tablet PCs (LCD/OLED) by measuring CFF (critical fusion frequency), BF (eye blink frequency) and (SR) subjective rating. Twelve healthy subjects (10 males and 2 females) participated in the study in a controlled simulated living environment with a 18-23°C temperature, 30-45% relative humidity and 150lx illuminance. The experiment was carried out about 50 minutes, including: 30 minutes watching task (EOG test) and 20 minutes test (including subjective questionnaire and CFF test before and after the experiment). The experiment design included dependent variables: CFF, BF and subjective rating (SR); and two independent variables: Tablet PC types, watching times. As a result, after the experiment, the decline range of CFF of LCD was lower significant than that of OLED (p<0.001); the decline range of BF of LCD was higher than that of OLED (p<0.01). Also, subjective rating indicated a consistent result that higher visual fatigue was founded after watching LCD. As a whole, watching LCD tablet PC caused higher visual fatigue than watching OLED tablet PC in general.

CRITICAL FUSION FREQUENCY IN THE CENTRAL VISUAL FIELD

1985 ◽  
Vol 5 (1) ◽  
pp. 15-21 ◽  
Author(s):  
W. A. Douthwaite ◽  
J. A. Halliwell ◽  
A. M. Lomas ◽  
W. K. Yan Muk ◽  
J. N. Topliss
Keyword(s):  
Visual Field ◽  
Central Visual Field ◽  
Fusion Frequency ◽  
Critical Fusion Frequency

Critical Fusion Frequency in Amblyopia

1985 ◽  
pp. 493-497
Author(s):  
Osamu Mimura ◽  
Yuji Okamoto ◽  
Kazutaka Kani ◽  
Takashi Utsumi ◽  
Toshio Inui
Keyword(s):  
Fusion Frequency ◽  
Critical Fusion Frequency
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