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Influence of spectral distribution on accommodation-vergence and reading performance

Annals of Eye Science 2017年第1期2卷 127-132页

作者： Shiva Ram Male Rishi Bhardwaj Chiranjib Majumder School of Medical Sciences University of HyderabadTelanganaIndia R J N School of Optometry GwaliorMadhya PradeshIndia

Background:To assess the influence of different spectral energy distribution on accommodation,vergence and reading ***:A Randomized experimental study was conducted after getting the approval of the Ethical Committee of University of *** participants with an age group of 18-21 years was integrated,out of which 50%was male and 50%was *** with emmetropia and no history of ocular pathology were included in the *** point of accommodation(NPA)&near point of convergence(NPC)was measured with the help of royal air force(RAF)ruler followed by near visual task of a readability ***:A statistically significant result was obtained when reading rate,reading speed and NPC was compared among different spectral distribution of light(Preading rate,reading speed and *** there is no noteworthy difference exist when fluorescent was compared with CFL for reading rate(P=0.530)&reading speed(P=0.595).Similarly,LED also showed no considerable difference when compared with CFL(P=0.682)and fluorescent(P=0.490)for *** NPA was assessed within the group LED showed insignificant difference with CFL(P=0.205)and fluorescent(P=0.275)similar like fluorescent and tungsten(P=0.482).Conclusions:This study concluded that reading performance(reading rate and reading speed)and NPC has a significance change if we use inappropriate lighting during visual *** will cause visual fatigue and strain after sustained near *** addition,tungsten spectral energy influences the convergence which can also show an impact on reading and near visual tasks because of its brightness and *** reading and working under this lighting can cause convergence disorders and visual fatigue.

关键词： Accommodation convergence reading rate reading speed readability spectral distribution correct word per minute(CWPM)

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