Abstract
PurposeTo evaluate the effect of fasting on contrast sensitivity (CS) in healthy male individuals during the month of Ramadan.MethodsThis study included 45 healthy male individuals, aged between 20 and 40 years, working in the same environment. Functional acuity contrast testing (F.A.C.T) was performed using the Optec 6500 vision testing system. Measurements taken during a state of satiety one week before Ramadan were compared with those taken a minimum of 12 hours after the start of fasting in the first and fourth weeks of Ramadan.ResultsContrast sensitivity (CS) was increased at the spatial frequency of three cycles per degree (cpd) at the end of the first week of Ramadan in comparison to the CS measured before Ramadan ( = 0.03). The mean CS values were increased at the spatial frequencies of 3 and 12 cpd at the end of the last week of Ramadan in comparison to the mean values measured before Ramadan ( = 0.01 for both).ConclusionAlthough we found statistically significant increases in CS at certain frequencies, we can conclude that Ramadan fasting has no negative effects on CS.
Highlights
To the best of our knowledge, there are no studies fully investigating the effect of Ramadan fasting on contrast sensitivity (CS) in the literature, and in the current study, we aimed to address this gap in knowledge
Our findings show that CS was increased at the spatial frequency of three cpd at the end of the first week of Ramadan in comparison to CS measured before Ramadan
The mean CS values were increased at the spatial frequencies of 3 and 12 cpd at the end of the last week of Ramadan compared to the values measured before Ramadan
Summary
The contrast sensitivity (CS) test measures a patient’s ability to perceive large, medium-sized, and small symbols under various contrast conditions. The test is used to investigate visual function and early signs of eye disorders.[3,4,5].
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