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The pupil is a hole located in the center of the iris of the eye that allows light to strike the retina. [1] It appears black because light rays entering the pupil are either absorbed by the tissues inside the eye directly, or absorbed after diffuse reflections within the eye that mostly miss exiting the narrow pupil.
In the Renaissance, women used the juice of the berries of the belladonna plant in eyedrops to dilate the pupils and make the eyes appear more seductive. Long, thick, and dark eyelashes are considered an attractive facial feature as they draw attention to the eyes.
When pupils are dilated, it means that they grow larger in size. This can happen for a number of different reasons, including drug use and arousal. 7 reasons why your pupils may be dilated, from ...
Examples of segment 1 pathologies include left optic neuritis (inflammation or infection of the left optic nerve), detachment of left retina, and an isolated small stroke involving only the left pretectal nucleus. Therefore, options (a), (d), (e), (f), and (g) are possible. A combined lesion in segments 3 and 5 as cause of defect is very unlikely.
Videos like this have helped the content creator find an audience with young fans, including Cindy Marie Jenkins's two kids, ages 6 and 9. “My kids laugh a lot at watching how long four ...
Opioids such as fentanyl, morphine, heroin and methadone (the notable exception being pethidine); Products containing nicotine such as cigarettes, chewing tobacco or gum ...
A baby's emotional reaction said it all when he saw the world clearly for the first time through his new glasses. Mercedes noticed her son Kasen's eyes crossing at their home in Evans, Georgia.
The irises of human eyes exhibit a wide spectrum of colours. Eye color is a polygenic phenotypic trait determined by two factors: the pigmentation of the eye's iris [1] [2] and the frequency-dependence of the scattering of light by the turbid medium in the stroma of the iris.