Handedness is the most obvious expression of lateralized behaviour in humans. However, there is only limited knowledge about other forms of lateralized behaviour, e.g. preferential use of an eye and whether these may correlate with handedness. Thus to investigate this, 100 subjects (50 males and 50 females) between 11 and 80 years of age were assessed for their eye preference, eye dominance, visual acuity, and handedness. Eye preference was assessed by performing four different monocular tasks, eye dominance by performing the binocular Dolman test, visual acuity was assessed with a Snellen chart and handedness was surveyed using the Edinburgh Handedness Inventory. Regarding eye preference, the right eye was preferred by 69% of the subjects. 90 % of the subjects were consistent for their preferred eye across all four tasks. 66% of the subjects had a dominant right eye, 33% had left eye dominance and 1% could not be assessed using the Dolman test. 56% of the subjects differed in their visual acuity between both eyes, while 43% had the same visual acuity in both of their eyes. 86% of the subjects were right-handed while 4% were left handed and 10% were ambidextrous. Significant correlations were found between visual acuity and eye preference and between visual acuity and eye dominance. The study also found a positive correlation between handedness and eye preference. These results support the notion that there is a weak correlation between the different aspects of lateralized behaviour in humans.

Most humans do not only have a preferred hand to use in different situations, they also exhibit a clear preference when it comes to eye usage. Few studies have assessed whether different tests of eye preference give congruent or incongruent results, and furthermore, there are conflicting findings on whether eye preference correlates with eye dominance, visual acuity, and handedness. The present study assessed whether these variables correlate, alongside factors such as age and sex. A total of 79 subjects, 45 males and 34 females, were tested. A microscope, telescope, photo camera, and caleidoscope were used to assess eye preference, the Dolman test was used to assess eye dominance, the Edinburgh Handedness Inventory was filled in to assess handedness, and visual acuity was measured using a Snellen chart. Care was taken to include subjects of various ages and both sexes. Descriptive statistics show that most subjects were right-handed, had a right-eye preference and were consistent across the four eye preference tasks, and had a dominant right eye. Significant correlations were found between visual acuity and handedness, as well as eye preference and eye dominance.

<p>The aim of the present study was to determine the distributions of and correlations between hand preference, visual acuity and eye preference through a series of tests in 50 males 50 females aged between 17 and 39 years. Handedness was determined through the Edinburgh handedness inventory questionnaire. The handedness distribution was: right-handed 90%, left-handed 1 %, and ambidextrous 9%. I found that 30 % had better visual acuity with their right eye, 39 % had better visual acuity with their left eye, and 31% had the same visual acuity with both eyes. 75.2% on average used their right eye in the battery of tests and 24.8% on average used their left eye. There were no statistically significant differences between the sexes or age groups with any of the measures. No correlation was found between eye preference and visual acuity or eye preference and hand preference among all subjects. No statistically significance between the sexes was found.</p>

The aim of the present study was to determine the distributions of and correlations between hand preference, visual acuity and eye preference through a series of tests in 50 males 50 females aged between 17 and 39 years. Handedness was determined through the Edinburgh handedness inventory questionnaire. The handedness distribution was: right-handed 90%, left-handed 1 %, and ambidextrous 9%. I found that 30 % had better visual acuity with their right eye, 39 % had better visual acuity with their left eye, and 31% had the same visual acuity with both eyes. 75.2% on average used their right eye in the battery of tests and 24.8% on average used their left eye. There were no statistically significant differences between the sexes or age groups with any of the measures. No correlation was found between eye preference and visual acuity or eye preference and hand preference among all subjects. No statistically significance between the sexes was found.

MÅL: Huvudsyftet med den här studien är att undersöka hur naturligt ljus påverkar det mänskliga ögats preferens för skärmens ljusstyrka när man tittar på en datorskärm. METODER: Tre experiment genomförs för att mäta i vilken utsträckning solljus förändrar bakgrundsljuset i form av solstrålning. Förexperimentet tar bilder med en kamera som simulerar detmänskliga ögat och en 27-tumsskärm för att simulerabakgrundsmiljön. Förexperimentet varierade skärmens ljusstyrka och efterexperimentet en RGB-bild i enfärgad färg för att få fram intensiteten av det ljus som kommer in i det mänskliga ögat under olika förhållanden. Kontrollförsöket ökade luminansintervallet till 10 och minskade ljusstyrkan till 5 nivåer från 60-100. Vi erhöll 2000 data om förhållandet mellan solljus och solstrålning för att förutsäga förändringen av ljuset i rummet när gardinerna dras för. Intervjutestade 16 vuxna som arbetar på Sogeti för att få fram deras preferenser för olika färger i olika bakgrundsbelysningsförhållanden. RESULTAT: Förexperimentet och kontrollexperimentet visade att varje färg har olika effekt på intensiteten av det ljus som avges av skärmens ljusstyrka när omgivningsljuset förändras. Intervjuresultaten visade att människor har olika preferenser för ljusstyrka. Mörka färger kräver högre ljusintensitet på skärmen när solstrålningen är 0:241, medan ljusa färger kräver lägre ljusintensitet på skärmen när solstrålningen är 430:751. SLUTSATSER: Den viktigaste idén är att upprätthålla ett visst förhållande mellan omgivningens ljusstyrka och skärmens ljusstyrka för att undvika visuell trötthet som orsakas av skärmen. Den här studien ger teoretiskt stöd till tillverkare av elektroniska apparater och ger referensutlåtanden för adaptiv justering av olika färger och ljusstyrka som visas på skärmar. / OBJECTIVE: The main goal of this study is to investigate the impact of natural light on the human eye's preference for screen brightness when viewing a computer screen. METHODS: Three experiments are conducted to measure the extent to which sunlight changes the background light in terms of solar radiation. The Pre-experiment takes pictures with a camera that simulates the human eye and a 27" monitor to simulate the background environment. Pre-experiment varied the brightness of the screen and post-screen of a solid color RGB image to obtain the intensity of light entering the human eye under various conditions. Control Experiment increased the luminance interval to 10 and reduced the brightness level to 5 levels from 60-100. We obtained 2000 data on the relationship between sunlight and solar radiation to predict the change in room light when curtains are drawn. Interview tested 16 adults working at Sogeti to obtain their preference for different colors in different background lighting conditions. RESULTS: Pre-experiment and Control Experiment showed that each color has a different effect on the intensity of light emitted by the screen brightness when the ambient light changes. Interview results showed that people have different preferences for brightness. Dark colors require higher screen light intensity when the solar radiation is 0:241, while bright colors require lower screen light intensity when the solar radiation is 430:751. CONCLUSIONS: The most important idea is to maintain a certain ratio of environmental brightness to screen brightness to avoid visual fatigue caused by the screen. This study provides theoretical assistance for electronic device manufacturers and provides reference opinions for adaptive adjustment of different colors and brightness displayed on screens.