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Al-Leyan: Difference between revisions
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===Eyes=== | ===Eyes=== | ||
Al-Leyans have excellent vision overall, though their vision is not as clear during | Al-Leyans have excellent vision overall, though their vision is not as clear during the day. Al-Leyans are used to dimmer lighting compared to that of a [[Terran]] on [[Earth]]. Because of this, most Al-Leyans wear shielded lenses during the daytime to help correct this problem, but it doesn't give them the same acuity as homo sapiens. | ||
Because they have a larger anterior chamber and lens, as well as a wider pupil, an Al-Leyan's eyesight is six times better than the average Terran's eyesight in extremely dark environments. They also have broadly elliptical pupils that appear round when dilated in darkness, but elliptical in bright areas. Their retina has mostly rod receptors, which are sensitive to low light levels and movement. Cone receptors help make them distinguish up to six million different colours - however, these cone receptors are primarily intended to enhance their vision, causing them to see colour in higher saturation in brightly lit areas. | Because they have a larger anterior chamber and lens, as well as a wider pupil, an Al-Leyan's eyesight is six times better than the average Terran's eyesight in extremely dark environments. They also have broadly elliptical pupils that appear round when dilated in darkness, but elliptical in bright areas. Their retina has mostly rod receptors, which are sensitive to low light levels and movement. Cone receptors help make them distinguish up to six million different colours - however, these cone receptors are primarily intended to enhance their vision, causing them to see colour in higher saturation in brightly lit areas. | ||
The average Al-Leyan has a layered structure called the ''Tapetum Lucidum'' at the back of their eye. This mirror-like structure | The average Al-Leyan has a layered structure called the ''Tapetum Lucidum'' at the back of their eye. This mirror-like structure reflects light that has not already been absorbed back into the eye a second time to help produce a brighter image. This causes an Al-Leyan's eyes to glow in dark environments when light is shone into their eyes. | ||
In addition to upper and lower eyelids, Al-Leyans also have a nictitating membrane, which | In addition to upper and lower eyelids, Al-Leyans also have a nictitating membrane, which helps keep the eyes moist and removes dust from the surface. Binocular vision enables an Al-Leyan to judge distances when jumping. | ||
==Psychology== | ==Psychology== | ||